Fertilization

"No one knows exactly where fertilization occurs...well, it occurs in the dark most of the time..." -On where in the reproductive track fertilization occurs

Menopause

"Menopause is probably a good thing, otherwise you'd be having babies at 68 and raising teenagers when you're 84. Thats not a good idea" - On the reproductive life cycle

Autonomic Nervous System

"Your urinary bladder will empty by itself. Even if you are passed out drunk it will empty itself. I imagine some of you have already figured that out" - On the autonomic nervous system