It can get wet, but I'll leave the research to you. ^^
Don't you know anime boys come pre lubed. Even in non-omegaverse stories the designated uke is typically self-lubricatung. At least that's what I tell myself everytime a seme tells the uke they're "wet " without any kind of preparation.
Yeahhh its magical on how their ass can get wet like that without any lube. I can understand omegaverse but this is... he better check his butt at hospital
Ikr
How your ass wet?