What a great experience.
This all happened when I was manager of a retail outlet. I had employed a part-time sales girl who was about 6 years younger than me. I was about 26 at the time.
Anyway after a few months of flirting we got together and had some great times. However, one recurring theme from her was whenever I was away from the shop floor for any length of time she would ask, 'Did you just play with yourself?'
After several weeks of this, we where in the back office fooling around and she had my dick out. She again asked how often I played with it. So I asked if she wanted to watch - she did.
I just sat back in my chair with my dick out and started to play, she was in a tight dress and sat there watching as I stroked my shaft. Every now and then she would ask how I felt and was I going to cum. I was really enjoying her watching and before long had a great orgasm.
We did this a few more times and then she would join in by playing with her pussy for me until she came as well. We have done it in all sorts of risky places - the best being in the middle of a local park in public. (I don't think anyone saw but what a rush.)
Ladies, if you want to see your man do it, I suggest you ask him. Personally, I love to do it in front of my girlfriends - assuming they have asked first.