There's nothing to understand. It's just an easy, underhanded way to "rekindle" reader's interest by adding instant cheap drama... Like seeing a car crash as if in slow motion and being unable to look away...
Or maybe the correct wording is "there is nothing to understand because there is nothing that is understand-able about it"...
I think that puts it a lot better. (-.-)
They use the same formula since the beginning of the history of yaoi simply because it works. It adds drama, sex scene and dialogue all at once
Yep. And also, it works because of us reader's pathetic human nature... We don't just trip twice on the same stone, we even take the darn stone home with us and make an altar to it...

why yaoi always seems to assume the only way to get someone to listen to you is to rape them. Like even if they don't go through with it, it's super offputting how quickly it's used as a solution and how easily it's brushed off.
Taku was legit like, "well I was gonna ignore him telling me to stop but then I decided meh, not really the time or place"
and then that is literally all we hear about it, no further problems arise bc of that shit. In fact, some problems are solved like jfc what