They don't, that's why we have subgenres like shounen ai where it's mild romance and the farthest they will take it is kissing.
I know there's shounen ai but in general bl is pretty sexualized, I'm not blaming anyone though, it's just a thing I noticed.
Mmm maybe bc I'm in both fandoms but I don't see it. This might be do to your algorithm bc there is a big market for things like shounen ai where it is not sexualized at all. In fact I'd say it's more wanted than the sex themed genres like yaoi. The reason is bc they do not see sex as real plot. Moreover, all my friends especially enjoy shounen ai than yaoi too. But I can how you'd see it if that's what your algorithm is feeding you.
*due (I mut be tired)
I give up
You might be right. I don't have anyone who reads bl around me and all I see on the internet are the 18 plus ones.
You know as I get older, I sometimes wonder why does bl needs sex to sell? Just a random thought.