Okay, so it doesn't sound like the right subject line, but we have 2 male
cats (brothers) and one of them just seems to love licking the other's butt.
I know they clean each other, but is this normal behavior? We have never had
two cats before so this is all new. We have never seen the other cat
reciprocate. This means the one that licks stinks most of the time and we
are apprehensive to pet him at that time.

Please tell us this is normal or if not, how do we get it to stop?