I always found it odd that steam seems to only do that with BL games. I've seen multiple straight up hentai games on there with loli characters. Steams so Sus sometimes lol.
Thanks for the info Sen ^-^. I will think about it a little more and I was thinking the same as you about the BL games in Steam but att the same time is strange because i buyed the game Uncle Neighbor and it as erotics scenes and others BL games too. And i think Steam let you hace NSfW games there now if i'm not wrong.