What rationale do girls use when they decide if a guy is hot or not, honestly?

Today one of my girl friends and I were just looking through our facebooks trying to find hotties for each other and she thought this one guy was so hot and i don't see how. He wasn't bad looking but, he did not have a good body, he had a little bit of a fat face and just looked like a normal guy. It seems like girls are so sporadic with this. As oppose to guys who generally look at face,boobs,butt,stomach.