Q. Why were the little ink drops crying?

A. Because papa was in the pen and no one knew how long the sentence would be.

Is this a dirty joke?

No, just a play on the ink in pens. Why, does it come across as dirty?

I meant "white horse in mud puddle" dirty.

Lol, in that sense, I guess it might be a dirty joke, but I prefer the clean jokes, the horse took a bath.