Ben has a cock that gets bigger every time he reaches orgasm. His cock starts off as a normal sized 6 inches and then grows about half an inch every time he cums. He can cum up to 8 times in a session so his cock quickly swells to a monster 10 inches. The volume he ejaculates gets bigger with each orgasm also.
His sister Sue, and her friends Jen and Ann discover Ben's talents early and help him explore his unique ability. The series revolves around Ben, his cock, and the girls, but there are many other characters in the series also.
The three girls are best friends and start to talk about sex one night. Then the talk turns to one of the girl's brother and rumors of his amazing cock.
Ben is looking to make some extra cash in a human sexual study. They were not expecting any guys with Ben's unusual talents to show up. When his cock starts to swell things get a bit out of hand.
Ben likes to jack off and finds out that jacking off in front of other people, like his sister is even a bigger turn on. The fact that he has a cock that just keeps growing and can ejaculate over and over just helps keep things moving along.
