I'm no stranger to that feeling but I'd have to admit, it doesn't come to me often. It's my fault really. When I meet someone I'm comfortable with, I tend to go overboard and act as if everything I do is ok and as always... it's not.
For someone who prides himself with being deliberate, prim and proper, getting called on for something offensive to another is a major major screw up. Think star pre-schooler committing his first offense and getting a major beating from his teacher in front of the class. Imagine the disappointment...
Worse, I was at a loss for excuses. I was at a loss for words. Fact is it was simply... my fault.
You learn a little each day.
You learn to reign in.