If I want a woman to pee on me, which I don’t, I think would just ask for a golden shower.
The conclusion from a medical study, “Nature and origin of "squirting" in female sexuality” by Salama et al, 2015 in the Journal of Sexual Medicine:
“ Conclusions: The present data based on ultrasonographic bladder monitoring and biochemical analyses indicate that squirting is essentially the involuntary emission of urine during sexual activity, although a marginal contribution of prostatic secretions to the emitted fluid often exists.”