We disagree about our idea of funny pranks, but we're together on this one.
A quick kiss hello and goodbye is all good, but it makes me uncomfortable if you're sucking face in a mall food court, or movie theather, or standing on the corner while waiting to cross the street. I just try my best to ignore it. Holding hands or having an arm around someone is no big deal to me either. Just save the swapping spit for when you're in private.
I wont give my wife more than a peck on the cheek if we're in public and I don't like to see much more than that from other people.