The most reliable way is to perform cunnilingus on any person with a vagina and let them cum on your face. Then quickly rush to a shower in a lab to collect the fluid. There may be others, but that's the only one I know lol
I can't seem to use any of the showers that are in the lab, have I not progressed enough?
When you upgrade the lab, you'll get the option to add a shower to the lab.
I see, thank you so very much
