Pucker Up: Do You Have To Kiss Under The Mistletoe?

Rik, Cefus and I were just discussing whether you have to kiss under the mistletoe or whether it's optional.

What if it's someone you don't like? Do you just give them a peck on the cheek?

Various mistletoe searches resulted in mix opinions ... some said you had to kiss someone under the mistletoe, while others said it was optional.

What do you think? Are you obligated to kiss under the mistletoe?