Reproductive anatomy/sex ed not offered in school curriculums anymore? Or do half of fellows cut that class?
When I was a curious young lass, I made it a point (heh) to learn biological male matters. I identified testicular cancer in one of my first lovers in college before HE was aware of a problem. Bugged him 'til he went to a doctor. He lost a Blarney Stone, but gained a long life.