Elbow suckage

I heard some noises from the crib.

As all new moms must, I jumped up to check it out. What do i find, but Joel, sucking on Roman's elbow. (no, he's not hungry--I checked--nearest I can figure, it was just close to his mouth, it fit, he started sucking). So I separate them a bit, offer him a pacifier (he didn't take it) and Roman starts crying!!! I guess he likes having his elbow sucked?

So all of a sudden, both formerly placid babies are fussing--what's a mom to do? I pushed them both back together and let the sucking continue. I really don't know what else I should have done...this seems to make them happy...but I think I will probably laugh later if Roe has a hickey on his elbow.