Kind of a hint that the author either never had anal sex or likes it bloody and painful.
If bloody sex someone wants do it with a girl on her period :/
But I mean since we talking about yaoi. . . just shove it in there a thrust cra cra
No mater how good the story around it is....you can guess the actual experience of an author when you see how they show sexual intercourse and foreplay etc....the ones where the guys just shove it in (if it is not even at least an omega who can get wet) it is obvious that it is either a women without anal or actual sexual experience or a man without any idea as well...but it is cute in some way though haha
So many quick inserts with no preparation. "I'm a virgin" bam. think that would cause tearing, esp the ones that don't bother with lube