You talk as if women don’t see dicks
It's not like it's part of our daily lives
If you’re in an active sexual relationship it is, also it’s not like they don’t learn it in school or see it in videos, like? These days even pre teenagers know how a penis works and looks be it hard or soft. It’s just that normally yaoi will always have dicks that look like they’re hard for aesthetic reasons and this is coming from someone who reads bl for 5 years now
Idk what's the sexed curriculum in Korea is, but I know that their society is way more strict towards this subject than in the western hemisphere.
I think it's what you said about "aesthetic reasons", even though I think this decision doesn't make sense (but it's MY opinion and it doesn't really matter).
I've read Japanese BL where they show soft dicks, but the Korean ones always look hard.
You can see women are drawing this when there's a huge hard dick and the characters say it's not. Idk someone could tell them that.
Or maybe it's their editor telling them to draw it like that, who knows?