Harry Potter series

The wizarding world had found peace. Evil was gone, but at great human loss. Therefore the Ministry passed a law, making all forms of sex at any time or place legal. This led to a sudden boom in the number of people having sex. Some places even made it compulsory to be naked in the premises. All of this led to lots of hot kinky sex all over the place. Women would have accelerated pregnancies and be back to form in 5 days. Magic led to body mods being the norm.

This way any girl could be modified to be the girl of your fantasies. Any boy would be morphed into the body type you want.