Today it's customary to greet people with a firm handshake, looking directly into the eyes, and perhaps a friendly smile.
Back in Bible times, they just looked at each other's penises when meeting someone. Yet another reason why the Bible isn't a useful guide for modern living.
Come to think of it, ToMo3's issues with tight pants shouldn't be an issue. Paul circumcised Timothy so that he could show off his snipped penis to everyone.