LOL - Oooops! A faux-pas of epic proportions, instantly followed by thoughts of, 'how am i gonna get outa this one'
Tactical and instant withdrawl required!

If it were the other way around, male slapping female, would the outcome have been the same? Misinterpretation can be a big problem, not just in the workplace but anywhere. You just gotta ensure the context is jovial and appropriate for the action.
We never know how people change over a long period of time, especially when they have their own lives, experiences and circunstances.

In this case he should have been flattered! Poor you though! Were you traumatised at the dissapointment to the lask of 'ass-hand contact' lol