Responses

Or placing anus (or vagina) in wrong position, for example too forward making it almost merge with balls (and yes, I've unfortunately seen few of these ☹). And you have good point about lubricants because it's so chronic in newest yaois that we can call it pandemic atp. Many straight people use lube too so it isn't part of taboo or whatever, so idk why authors try to avoid it. We should fund some Sex Education classes for yaoi/straight porn authors (at least yuri creators are correct most of the times)
Another vagina booty hole Σ(  ̄□ ̄||)