Plaqueface
Barium.
Your arms have gotten sore.
DJ Beazza Yes it's a stupid pun, but that's a good 50% of my humor, the other half being sarcasm.
Because they have running yolks.
Tooth-Hurty
You don't look a gift horse in the mouth.
A Yutopia
They both form a bond in seconds, last (ideally) forever, and are dissolved by alcohol.