I don't know about you, but all I got from my health class in Catholic school was a small stick of Old Spice deodorant and the unsettling feeling that Jesus would know when I masturbated. Ever hear of a 'no promo homo' law? It's a heinous education law that expressly prohibits teachers from discussing LGBT issues - including sexual health, which can lead LGBT youth to feel invisible, anxious, or depressed. It's not surprising, considering the lack of gay representation in entertainment and the disturbing void of sex education in schools.
The basic mechanics of gay male sex remain a mystery to many.