When I moved to the UK a several years ago, I was surprised at the amount of sexual banter and tension in our office. Having had most of that choked out of me at sexual harrassment training in the US, I really wasn't quick to join in. One thing was clear, my secretary, Clare, was a gawker. It wasn't so much a bulge, but she used to stare at the outline of my cock hanging under my dress slacks. Finally, one day, I was giving her some instruction and I looked down to see her staring at my cock. I interjected, "Hey, Clare, up here." And pointed to my face. She turned bright red and got out a meek "Oh, sorry." The rest of the day when I walked by, the girl next to her would look at Claire and giggle.
The only other time this sort of thing came up in the workplace was one time when a group of us was talking about going to the gym, etc. Several of the people we talking about where they go, why they choose the time they do, etc. One of the guys, who actually was more the office gossip than any of the girls, chimed in that he didn't like to go because he really didn't like the whole locker room thing. When I said I really didn't mind it, he replied, "Yeah, but I'm not hung like some sort of farm animal." The group "whooped" for a minute and this time I turned bright red.