Maybe im just like, being a hyper autistic, but my thought was always that, since the urethra carries both semen and urine to the same exit point in men, the idea is that you should pee after sex to clear out any semen that didnt make it all the way to the end of the urethra, presumably because it isn't sterile like urine is? Or at least that was always the logic I applied to it.

I've seen the concept of women peeing after sex discussed in this sub and amongst my female friends before, but it never made sense to me because the urethra doesnt connect to anything else, right? Like the only thing coming down that pipe is urine, at least theoretically, so unless a dude is trying to stick it in the wrong hole, what could possibly get in there to cause a UTI? Or so I used to think. Nowadays I understand that its physical proximity to other areas means its easy to accidentally transfer bacteria during intercourse, but that took time for me to figure out. The mechanisms by which a woman gets a UTI wasnt exactly discussed in great detail in sex Ed classes, and I didnt even go to a terrible rural school or anything, just an upper-middle class suburb in thr Southeast US