So I was talking to my (male) roommates about sex and mentioned that I usually pee fairly immediately afterward. They made faces about it for some reason, and I brought up yeast infection protection as a benefit of peeing after sex. They made dubious noises about it and one even said that this has been dis-proven. Now, I am lucky and rarely get YIs, but I know women who get them frequently, especially if they don't pee after sex. So here's my question: does peeing after sex actually help prevent yeast infections in some women, or not?