kwame,
Because your previous posts have all seemed sincere (and, with legitimate questions to help you learn and be better informed, too) I will attempt to answer your question as straight forwardly as I can.
It's long been "debatable" what really occurs when a woman produces an "extra outflow" of fluids during intercourse. I hardly think it's (routinely) urine!--only in the rarest of occasions and it is more than likely NOT an intended occurance...but more of an embarrassment for her. Urine flow is NOT common from women during sex.
What IS likely is an "abudance" of vaginal fluid which the woman naturally produces to help prepare her for the act of sex...it's a natural lubricant type fluid that assists with the "mechanics" of the male entering her...that's all--(i.e.helps with the "friction" factor and keeps things moving smoothly during intercourse.)
Some women may produce "more" of this fluid to the point of "excess" which is what "runs out" so to speak.
Actually, for ease of intercourse, this vaginal fluid is quite necessary and encouraged (through foreplay) which you have read about throughout this forum in other posts. Lots of "jokes" and humor on the streets about women producing this fluid, but it's truly a simple matter really of nature providing for the act of intercourse...part of the "grand design" of our bodies if you will. So, don't be fooled by (or, drawn into) all the gutter slang. It can be misleading.
Hope this info helps you.