whoopi goldberg and joy behar kiss

This week on The View, the ladies were talking about how to avoid getting the swine flu. The discussion began with ways to handle (or not handle, as the case may be) guests, to reduce the amount of germs passed from one human to another. Or something.

Anyway, during the course of the bit, Joy offered several options, including the elbow-bump, the knuckle-bump, and -- getting progressively worse -- the hand-shake, the body hug, an air kiss, and then a full-out kiss on the mouth. She proceeds to demonstrate this on Whoopi Goldberg.

My question is this: Why do the ladies of The View always end up kissing each other on the mouth? Ok, "always" is a pretty strong word, but there was the Meredith Vieira / Barbara Walters smooch, and I'm sure others in between that one and this one between Joy and Whoopi.