I've always been somewhat of an exhibitionist, even though I'm also shy. I got turned on during a non-sexual massage and took care of things right there.
I get legitimate (non-sexual) massages from time to time. Most are very good, very relaxing. A recent one made it a bit harder (pun intended) for me to relax.
Stacy introduced herself, and I was a bit taken aback by her beauty. She was probably in her late 20s, average to slim build, very attractive. Nice body - nice sized breasts (at least C cups) and a very nice, firm ass. She left the room to allow me to undress. I got under the sheet on my stomach.
There was no hanky-panky on her part, though she did massage a bit higher up the leg than some massage therapists do - but still nothing too unexpected from a legitimate massage. She had a very good touch - just firm and deep enough. After massaging my back, arms, legs, and neck, she had me turn over onto my back. That's when things got a bit interesting.
The rest of her massage wasn't really anything beyond what's expected from a legit massage. As when I was on my stomach, she did work quite high up my thighs. But watching her as she did this caused my cock to grow. As she massaged my legs/thighs, it got harder until it was completely erect and sticking straight up under the sheet. Stacy didn't say anything as she continued with the massage.
I was pretty certain she wasn't going to do anything, so I decided to ask her if she minded if I "take care of it." She said "no problem" and something like "this happens sometimes." I asked her if she was sure, and she said "go for it." So I moved the sheet exposing my rock hard cock and slid one hand onto its shaft. Stacy offered some massage oil, which she put in my hand. I proceeded to stroke it with both hands as she worked on my lower legs. She didn't say anything, just gave a slight smile as she continued the massage while I was pounding my meat. It didn't take me long to explode, with several spurts of cum shooting up out of my throbbing cock, landing on my chest, legs, and the table. When I was done, she left to get a towel for me to clean up.
While it would have been great to have her help me, masturbating while someone watches is a big turn-on to me also. I would have loved to see her tits and her ass, but I wasn't going to risk getting in trouble by asking. I thanked her, gave her an extra tip, and left the spa.