Most Helpful Guy
It's hard to say without having seen and heard how it happened. As the one not late for work, it's easy for you to think that it'll only take a second for a kiss. Try and see it from his view. He might have been stressing about being late and didn't think about a kiss. So when you just sat there, he might not have known why you were doing it and it could have seemed like you were just wasting time.
I'm not saying he wasn't rude, I'm just saying it might not have been intensional.