Some of you lot are amazing. When you get all grown up and manage to make a woman pregnant you might notice that she has to go to classes or just given advice from midwife/doctor, if you pay attention to her or show some interest you might find out she's told to do some exercises after the birth to tighten things up again. A vaginal prolapse can also be caused by having sex under water though. ( just like how a sink plunger works )