Chapter 9

Paul had at least four reasons why he should not remove his shirt in front of the girls. Those four he voiced. There were a few more he didn’t voice, such as the belief that they’d laugh at him. He wasn’t buff, or strong or, in his own mind, handsome.

They wore him down, though, and then helped him pull his T shirt up and off his body. Emma leaned forward and ran the fingertips of one hand over his left nipple.

“Boys’ nipples get hard, too,” she said, softly.

He looked down and felt the difference between that nipple and his other one. He also felt her fingers bump harder as they moved back and forth, because his nipple was, in fact, becoming erect.

“If you were doing this to me, my nipples would get very hard,” whispered Emma.

“You can do it yourself,” said Beth, who was now rubbing and pinching her nipples through her shirt. “You do your other one.”

In a daze, he did as he was ordered, and reached to feel his right nipple. He had never “felt” his nipples before this. They were just there, parked on his chest, useless and illogical. Now, though, he felt little zings of what ... pleasure? He was instantly fascinated.

“Beth is making her nipples hard,” said Emma, leaning back. “You could make mine hard and then compare them to see if there’s a difference.”

“What?” Paul had been thinking of whether this erectile situation in the nipples could be compared to the erectile tissues in the groin and then her “if you made my nipples hard” comment sank into his brain.

She stood up and turned her back to him. Then, calmly, she took her shirt off. He watched as her arms seemed to move illogically to unsnap the plain, white bra she was wearing. His dumbfounded eyes saw the depressions in her skin where the bra had restricted blood flow and then she put her shirt back on and turned around to face him again.

“I rubbed your nipple,” she said. “I want you to rub one of my nipples and squeeze the other, to see if there’s a difference in the stiffness this will cause.”

She moved in front of him until her now unfettered breasts were right in front of his eyes.

“They’re already erect,” he breathed.

“That’s just because this is exciting,” she said. “See if you can get them harder.”

“I know one way to get them harder,” said Beth.

“Not yet,” said Emma. “It’s too soon.”

“What’s too soon?” asked Paul, as he stared at the nipples he’d been invited to touch. Yes, it was through her shirt, but it was still enough to have already affected his erectile tissues.

“Never mind. My nipples? Please begin.”

He felt like he must be dreaming as he put the fingertips of his left hand over her right bump and reached for her left bump with the fingertips of his other hand.

He immediately found it was like trying to rub one’s tummy while patting the top of the head at the same time.

The “Mmmm” that came from her throat made his penis even harder, which only complicated matters in his mind as he actually tried to come up with a theory of how this all worked.

“It’s hard to tell,” he said. “They’re both stiff, but the shirt inhibits my ability to feel a real difference.”

“Then put your hands under my shirt,” she said.

“What?” He blinked.

“Put your hands under my shirt, Paul, so you can feel the difference.”

“I can’t just touch your breasts,” he groaned.

“One, you already are and two, you can if I say you can, and I’m saying you can.”

She reached for the hem of her shirt and pulled it away from her body, making a gap for his hands.

“This is a little more advanced, in terms of dating,” said Emma. “We’ll talk about when you can try to do this on a date, later. For now it’s just for science.”

She waited, patiently, as Paul worked up the courage to actually put his hands under her shirt. His mind was whirling and he watched his hands as if they were the hands of some other person as they slowly disappeared under the fabric of her shirt. His fingertips ran into the smooth skin below her breasts, and then slid upwards, finding the lower swells, and then the sides, until his palms were stopped by the bulk of her breasts.

“They’re warm,” he sighed, as his hands covered her mounds; the first breasts he’d ever touched with his hands.

“Yes,” she sighed. “Now the nipples, Paul.”

His fingertips found the little bumps and formed around them, encircling the turgid lumps and then, gently squeezing.

“Oh, yeaaah,” sighed Emma. “Are they getting harder?”

“Um ... I think so,” he said.

“I think so, too,” she said. “Squeeze harder.”

“I don’t want to hurt you,” he moaned.

“I’ll tell you if you’re hurting me,” she moaned in reply. “Harder!”

She said “Harder” three more times before Paul was convinced he must be causing pain.

“I like this a lot,” Emma moaned. “It excites me a lot.”

Paul didn’t want to say he was having a blast, too.

“I hope you have the data you need,” she said, “because it’s time to stop.”

His hands fairly shot out from under her shirt.

“Break time,” said Emma. “Beth and I need to go do something but we’ll be back. You can analyze the data while we’re gone.”

“Where are you going?” he asked out of pure curiosity.

“We’re going to go masturbate, Paul,” said Emma, calmly. “All this nipple play has gotten us aroused. If we were on a date with some random guy and had let him touch us like you did, and we didn’t want to go any farther, we’d say it was time to go home.”

“Oh,” he sighed. “I’m sorry I intruded on your privacy.”

“You didn’t intrude. We need to learn some chemistry tonight and if we don’t get calmed down we won’t be able to concentrate. If you’re excited, too, you can masturbate while we’re gone.”

“I can’t do that,” he groaned. “Not here.”

“Would you rather go into the back yard and jerk off in the bushes? It might be kind of cold.”

“No, of course not,” he said.

“It’s nice and warm in here. I’d suggest we all do it together, but it’s too soon for that.”

“Too soon?”

“Too soon for you,” she said, gently. “We like you. That should be obvious by now. We’ll be ready to do things before you’re ready and we don’t want to freak you out. There are many more lessons to learn about dating.”

“I’ll just wait, here,” he grunted, as his mind whirled.

Where they went was the bathroom. It would have been tempting to go find Daddy, but that would take too long. Emma sat down on the commode seat and spread her legs as she shoved a hand into her panties. Beth chose to just stand, with her feet 30 inches apart and reached to hook a finger into her pussy.

“I want to see him jerk off,” moaned Beth.

“Not yet,” groaned Emma as she began mauling her clit. “He’s not ready.”

“You almost jumped over touching outside the clothes,” panted Beth.

“He’s got a really gentle touch,” gasped Emma. “He’ll be as good as Daddy with a little practice.”

As the girls rubbed their slick quims until they got a quick, small orgasm, they had no idea they were sliding down a path that was just as slippery as their vaginas.

Back in their bedroom Paul decided to meditate, instead of masturbate. He couldn’t empty his mind but he tried to think about what had just happened as data, like Emma had suggested.

He knew the biological process that made a penis erect. What was going on in his pants was clear to him. He also knew that the penis on a woman was internal, with only the very tip, the clitoris, exposed. The logical assumption was that the clitoris had erectile tissue in it, as well.

Assuming that the clitoris reacted just like a male penis was ... comfortable. It made sense. It was logical. But why did nipples erect? And how? What was the physical, chemical reason the tissue changed? He had just decided that it was probably to make the nipple utilitarian, in terms of feeding a baby, when the girls returned. Their faces were flushed, but otherwise they acted just like they had always acted.

“Just a little more about what happened and then we can study chemistry,” said Emma. “If you were on a date with a girl, the first thing you might try is touching her breast over her clothing. She’ll either accept that or reject it and tell you to stop. A gentleman will stop. A jerk will keep trying to touch her. Normally, you don’t get to touching her naked breast until the third or fourth date. If she likes making out with you and she lets you touch her outside her clothing, then you can see if she’ll also let you touch her naked breast. There’s more about breasts, but that’s enough for now. So, what did you learn?”

“I’m not sure I learned anything,” he said. “I have some theories, but I’ll need to do a lot more research to understand what’s going on. I know it’s chemical, but I don’t think it’s kinetic.”

“Maybe we can do more research in the future,” said Emma. “I liked the way you touched me.”

“That’s what I don’t understand at all,” he groaned. “Why did you tell me to touch you like that?”

“I already told you. I like you. Beth does, too. When I’m with a boy I like, it’s fun to get excited. Didn’t you have fun?”

“I feel like a boxer who got in the ring because he thought he could win a fight, and then got beaten to death.”

“Did you jerk off?”

“No. I told you. I can’t do that here.”

“We’ll work on that, too, but only at a pace you’re comfortable with,” said Emma.

“Okay, now I feel like I stepped through an interdimensional door. When, exactly, do you think I’ll feel comfortable masturbating at your house?”

“We hope very soon,” said Beth. “I really want to see you do that.”

“You want to ... watch?” His voice was almost a whisper.

“It is a ton of fun when you like each other enough and respect each other enough that you feel comfortable doing that on a date.”

“How can that ever be comfortable doing that ... together?”

“Were you comfortable feeling my breasts?” asked Emma. “I know I was.”

Paul blinked.

“I can’t answer that question,” he said.

“Were you un-comfortable? Did you wish you weren’t doing it?”

“No,” he said, immediately. “It was the first time I ever did that and my mind is kind of jumbled up, but I know I didn’t hate it.”

“Maybe next week you can feel Beth’s breasts. You’ll be more prepared and maybe your mind won’t jumble up like this.” Emma smiled.

“Teach us some more about kinetics,” said Beth.

An hour later Paul left and rode his bike home in the freezing weather. He didn’t mind, because his body felt hot. All the way he tried to come up with some rational reason the girls might have done what they did. He was sure they had not been pranking him but could formulate no theory. He realized his deficit in knowledge of women and why they acted like they did was making it too difficult. He needed to know more. So ... if they really did offer to keep teaching him ... he needed to cooperate.

When he got home he grasped his penis and, with memories of how Emma’s breasts felt in his hands, came within two minutes.

After Paul left, the girls went looking for Bob. They found him in his recliner, reading the Penny Saver brochure. He wasn’t actually looking for anything, but he liked to keep up on prices.

“Daddy?” said Emma, kneeling down beside his chair.

“Mmm?”

She reached for his lap and grasped the soft lump she found there.

“We need you to make this nice and hard,” she said, squeezing his cock.

“Do you, now,” he said. “After being tutored in chemistry? I know hormones is part of chemistry. Did you talk about hormones tonight?”

“What we talked about doesn’t matter,” said Emma. “What matters is that I need your long, hard penis in my vagina. Beth does, too. Okay?”

“Your mother is reading on our bed,” he said. “We’ll have to use your bedroom.”

“That’s fine,” said Emma. “Hurry. We’re horny!”

By this point Bob was “trained” when it came to servicing the twins. Sometimes that’s how he thought of it. They needed servicing and he serviced them.

What that meant was there was a little less passion than when he first slid his prick into them. When they came to him together like this he had to pace himself. That meant he had to push their buttons and he knew exactly how to do that. With Emma it meant going in deep and rubbing her clit with his pubic bone. That sent her to the moon, usually in less than ten minutes. Beth, on the other hand, liked the in and out movement that stroked the walls of her pussy. She liked different positions, too, because he could slide in and out of her then, too. His favorite position with Beth was to sit in a chair and let her rise and fall on his cock while he sucked her nipples. That got her off within ten minutes, too.

Only after they’d had their orgasms did he think about his own. It didn’t matter which twin said he could cum in her. The fantasy he had that got him off quickly was that, somehow, her IUD had fallen out, and when he spurted in her she was unprotected. His fantasy was of getting his daughters pregnant. He’d felt bad about that in the beginning, but not anymore. It was just a harmless fantasy. Julie had gone off her pills and was actively trying to get pregnant again and he came just as hard in her as he did in the twins.

Thus far, though, nothing had happened. It had been three months and she’d had three periods.

He would be happy continuing to try. If he could get one of his women pregnant that would be all he wanted.

On this night the girls got off but he saved his load for Julie. The girls kissed him on the lips and said he could go.

Bob, still naked, walked to the master bedroom and entered, striking a pose, with his penis jutting out.

“Wanna play hide the sausage?” he suggested to Julie.

She closed her book.

“I do,” she said. “Is there anything left for me?”

“There is everything left for you,” he said.

The next Friday night Paul arrived at the Cunningham home with some expectations that weren’t met.

It started off well, with each girl giving him a kiss that made his knees a little weak.

Then Emma said, “No dating lessons tonight. Tonight is for chemistry only.”

“Oh. Okay,” he said. The sadness in his voice was thick.