Although people say it is bad to judge, it is actually completely natural and is what has made humans survival in the strongest form as evolutionally we tend to select a partner on the similar physical ratings that we rate ourselves at, but always try to go for the highest level possible as, in order for the human race to survive, the number one thing is reproduction. People will subconsciously try to pick the best person they can in order to reproduce successfully but will also settle for lower standards in order to just try. It's almost like a form of eliminating the weakest, which although doesn't sound nice - is completely sub-conscious. Therefore - we all judge on appearances as they say a lot to do with reproductive factors.