Someone was enjoying this section at the book store too much

That's the joke

Oh my lord I didn't even notice that. xD

This is what's wrong with society. Inbreds and abominations plaguing our children into extinction. Please kill yourself for the faith of humanities' future.

It might be pee, or barf.
I'd not want to step in that

You'd still step on it when it's dry

True. But it looks pretty wet in the picture