Prostate piss orgasm?

Another thread on prostate orgasms made me curious whether anyone else has ever experienced a "pee orgasm" when engaging in prostate stimulation. Twice, when my girlfriend has been vigorously pressing on my prostate (once with a kind of dildo, another time with an njoy wand), I've had my penis go limp while a powerful, orgasm-like feeling begins to build. The first time, as the sensation grew, I thought I was about to get one of the fabled hands-free orgasms, and we were both shocked when, instead of anything like semen, my still-flaccid penis started squirting piss. The second time, we were more prepared, but this is still something that I've seen discussed less in conversations about prostate play.

Has anyone else experienced this kind of thing? It seems like the male equivalent to "squirting."

I have also experienced this when receiving intense prostate stimulation. Flaccid penis, orgasm-like feeling builds and then I squirt piss.