_{[ Gintoki has every reason to fret, in all honesty. Most people need to heads up before doing this sort of thing so they can clean up everything down there and make it more presentable, but..
It's pretty obvious that Aikuro doesn't care. If he did, he would not have suggested it in the first place, and Gin needs to realize that.
Once his partner is positioned, Aikuro pops another hit on his ass cheek. ]}

Oh, relax. It's not gonna be any fun for you if you keep double thinking yourself. Just tell me if you like it, alright? It's not everyone's cup of tea, I get it, but you don't know until you try it.
<sub>[ His hands knead his butt cheeks then spread them apart, pressing his lips to one cheek in a small kiss, humming slightly while doing so. It's a nice butt to eat, he'll admit— maybe that's why he wanted to do it— and maybe he needs to tell Gintoki that? Ah, maybe later.
He then wets his lips and proceeds to work up some spit to merely drizzle it along Gintoki's entrance, then, uses the very end of his tongue to spread it along the sensitive area of flesh.

Aikuro starts slow, rolling his tongue in a circular motion, hardly applying any pressure until he gets a signal from Gintoki that he likes it. ]</sub>