Caught Red-Handed, Or Should I Say Red-Dick-handed?

I was at my office today when I realized I hadn't locked the door properly. In a moment of sheer wantonness, I decided to indulge myself in something that's been on my mind for weeks, using a vibrator. It was exhilarating and felt so naughty given my surroundings. The idea of someone walking in made it all the more thrilling. Of course, there’s always the risk of getting caught, which adds another layer of excitement. But is this normal? Should I be worried about these thoughts or desires? What do you think? Do other middle-aged men have similar fantasies at work?