I've actually done this before.

So this is probably my reaction if I fore-see a "being pushed into the mistletoe" thing coming.
If I don't notice mistletoe, this is probably my reaction... Followed by a punch for stealing a kiss from me, tradition or no.
Apparently, if it's I wanting the kiss, I'd probably lure them in with a "Hey, let's go kiss under the mistletoe!". Because I'm subtle and cunning.