Have you ever been caught doing something sexual while at work?
It could be mild or extremely naughty...
Mine? I was relatively young (20) and had just discovered the joys of masturbation and touching myself. I was in the middle of a conversation with two young men, and they suddenly stopped and commented (in front of me, to my mortification) about how I had been unconsciously rubbing and circling my nipple with my finger the whole time.