Kate Smith comes home from a hard day at the office. Luckily for her she has the sweetest mouth to come home to. One belonging to her 14-year-old daughter.
Pa had three sons who courted the girls at the neighboring farm. It was hard for them to pick three out of the five girls to marry. The girls had two sisters left behind so Pa marries both the two remaining girls. (I guess you can do that in fantasies and on scattered farms). Pa had to trade his daughter Annie in marriage to Zeke, the father of the 5 girls. Who gets which girl Pregnant is the essense of the story.
Deeply religious Jo returns home from college to discover her parents and brother are into a swinging lifestyle. She is blackmailed first by her brother into exhibitionistic activities leading to her rape and pregnancy. Her parents will only help if she submits completely as sex slave.
A spaceship is going to colonize a new planet. Towards the end of the trip, a major goal is increasing the colonist population rapidly. To conserve resources, people spend most of their time asleep, often awakening just long enough to procreate. Then Jason is found to have a gene which makes him the preferred father for every new baby. 'How do I fuck thee? Let me count the ways.' Emotional positions, not physical.
Gabby is a sexpot trained by the most depraved sexual addicts. She tires of her lifestyle and marries the new Brazilian Ambassador. After the honeymoon has worn off, she reverts back to her erotic ways and learns new tricks in her new home.