I always imagine what could happen if one playfully slapped the backside of Sonny Liston or Mike Tyson. I fear everything would suddenly look 'very sparkly' until you hit the deck, too late to say sorry Mike sorry Sonny, I was only playing. I think the best way everything considered, wisest to keep your hands to yourself, lest they happen across the wrong anatomy. Unless you are in bed with a hot sort who is gagging for it, then they may roam freely and wildly, lightly and tenderly, all over those rarest of individuals, the hot one.