I think we need to include the rest of the world in this one.
I had an experience during the holidays when mini chocolates got passed around. I ended up with a brown spot on my upper my lip and not a single person at work (all men — who apparently had a great time yucking it up at my expense — had the decency to let me know).
When I saw it three hours later in the bathroom mirror, I was pissed. I'd noticed the smiles and the sniggering all afternoon, but I ignored it because men at work made private jokes all the time and I didn't think it concerned me. When I realized I was the subject of the joke I let them have it.
They're all afraid of me now. As they should be.