Well, what if the bigger one was the female, and the smaller one was the male??
Bah ha ha ha! cover your tracks Ron, cover your tracks.This is a disturbing and, hopefully, hypothetical line of questioning, not unlike the one that went through my head when a met a pair of Olympic medalists that had married.
He was a shot-putter and she was a gymnist.
(On the off-hand chance that they are dog-lovers and reading this thread, I thought they made a lovely couple.)