You are likely aware that the anus is pretty darn close to the vªg!ñå. This means that fecal bacteria is also nearby, even in the cleanest of women. This situation plus §£X can have an unpleasant outcome. “When you have intercourse, that penetration allows some of this bacteria to get closer to the urethra,” says Kim.
Women have short urethras compared to men, so it’s easy for this bacteria (once inside) to make its way to the bladder, where it can multiple, damage tissue, and cause inflammation.
This is a urinary tract infection (UTI), which can be painful and require antibiotics. Peeing right after §£X can help prevent the spread of fecal bacteria to the bladder and, there for UTIs. This is also why partners should not switch to vªg!ñål intercourse right after anal.