For me it was by watching Junjou Romantica in Youtube when I was 16. I mistook Misaki with a girl and I thought it was shoujo. So, it was a real shock for me, I didn't even know yaoi existed in general and I was super innocent even at that age. Anyways, at first I felt disgusted (I grew up in a quite homophibic family), but after that shock I became curious and kept watching. Now I only read yaoi lol.
i finished watching junjou romantica and was complaining to my friend about wanting to see more and she said i should read yaoi and sent me the link (〜 ̄△ ̄)〜 i was hooked after that 2 reply