Watch me jack

I have those urges sometimes but I was always afraid to act on it. The only time it happens is at my massage therapist, who noticed I often got erections under the drape.
One day she asked me if it made me uncomfortable, because I was tensing up.
I told her yes, she told me I could go ahead and relieve myself if I wanted to, so I did while she sat there and watched.
Now during our sessions, she bumps me a lot more than normal, and lets her fingers brush my balls until I get hard.
Then she sits down while I finish.
I did ask her once if she would do it for me, and I got a "Maybe someday" but so far she hasn't.
Something about silly State laws I guess.