I have seen it in some I have read but I think they are talking about their dick lol(≧∀≦)
Older yaoi authors didn't seem to know about lube and basic physiology. So either it's their dick or cluelessness.
cultural and language difference. when they are talking about "wet" it's the dick.
Thats what i thought at first. However I've seen panels where the seme is clearly not giving the front attention, and in the next panel he just pulls his hand up all seductivly and it looks like he fisted a mayo jar.
One of the more funny issues some yaois have so I don't mind lol
So in a lot of Yaois I read recently the btm is "wet" when the top is fingerbanging him. Wtf does that even mean? And these weren't ABO's (which is a topic in itself lol) either so I'm really confused if its just clueless authors writing this shit or if its literal shit .-.