All jokes aside, I have met a woman who was able to drip when being fucked. She's a provider I met an KMP in bayside about a year ago. Initially I would just ask for an hj from her, but on my second visit, I asked for FS, which was fun with her, for one reason, her pussy would get very wet during foreplay. A semi-clear liquid would ooze out of her pussy when I would tickle her clit and play with her labia. During a FS session a few months back, she was in a CG position, my crotch felt moist, so I reached around felt this warm liquid dripping onto the condom and onto my crotch. It didn't feel like urine, it was too thick and odorless. It was the consistency of astroglide or lube. While she'd be in this position, she could come 1,2, maybe 3 times. By the third orgasm, she'd collapse on my chest.
Here's the deal, this was back in the summer, I have been back a couple of times, but she has not been able to do this since the summer. I've wondered if it has anything to do with being well hydrated (i.e. drinking more water in the summer may encourage the expulsion of said fluids) Her english is not that good, and when I've tried to bring it up, I don't think she understands what I'm saying to her.
I'm not sure if I was able to answer your question, sjaust. But in my limited experience with this subject is lots of foreplay, and delay the fucking as long as you can. It builds anticipation.