Since people are arguing about parents...my parents never talked to me about sex, but they also never gave a fuck about what i watch, played, or read.
I remember thinking my 2nd grade teacher was hot. She would wear loose blouses and i could always see down her shirt. I knew what gay meant since 1st grade even if i never saw a gay person or a gay person on tv. I knew because gay, gaylord, and fag were good insults for boys. Most kids had crushes on other kids but at most it would only lead to holding hands or a kiss on the cheeck. Sex was not something i thought about though as a kid. Even knowing what sex was, i didnt know how it worked. I had no idea what ejaculation was. I remember watching Booty Call and thinking the Jaime Fox character peed inside the woman since he said "ive been holding that one in for awhile".
I grew up before the internet was common and you still had to steal playboys. I learned from other kids my age. Today you have kids learning from creeps online. I also blame anime and 4chan. We are seeing the natural conclusion of "are traps gay?".