Why does the uke always have to have drool, or snot, or tears? -sigh

IKR? It's like one of the yaoi tropes. For me, it just makes the work dirty (as in all over the place and not neat).

I´ve always thought that too! Foog to know I´m not the only one who dislike things like that. （￣へ￣）

Because he's the one who's taking the dick. So either he is crying from pain, drooling from satisfaction or he is snotty because he has the flu. Take your pick