When I worked at an office job I shared a cubicle with 3 others. I'd wait until I had it to myself and most other people had gone home and then surf for porn. After a while of this I pulled my cock out one night and jerked it right there at my desk.

There was a cleaning woman who walked in on me in the bathroom a couple of times late in the evening when I was using the urinal. The first time she went right ahead and got started cleaning the sinks, but the second she turned and left to wait outside. From then on I always hoped she'd come back and "catch" me but she never did. I was planning to turn and have my cock exposed while I tucked it away.....even thought about waiting in one of the stalls jerking it.

I was seeing a girl from work once and we'd get pretty hot sending explicit interoffice chat. Got so hot once that we just walked in to one of the offices and she sat down to suck my cock. I don't think it was two minutes before my cum squirted down her throat an ran down her chin.