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Growing up, we heard a lot about what we should and shouldn't do before, during and after sex. Advice is so conflicting that we often don't know what to believe. Thankfully, most tips are useful. But there's one that we've apparently been given incorrect information on. Women might have heard that you should empty your bladder before sexual intercourse to reduce the risk of developing a urinary tract infection. But according to a urologist, this is the exact opposite of what you should do. David Kaufman MD told Yahoo News that the 'pee before sex' mantra is "one of the biggest misconceptions he has to clear up for his female patients." Going to the bathroom beforehand is a big no-no, but urinating afterwards is important.
Why should we urinate after sex?
During sex, bacteria from the vagina can be forced into the urethra. Urinating can dislodge the bacteria and dispose of it safely in your stream - but if you don't need to go to the toilet after sex, it can mean the bacteria makes its way into the bladder and develops into an infection. You are likely aware that the anus is pretty darn close to the vagina. This means that fecal bacteria is also nearby, even in the cleanest of women. This situation plus sex can have an unpleasant outcome. "When you have intercourse, that penetration allows some of this bacteria to get closer to the urethra," says Dr. Ja-Hong Kim.
Women have short urethra compared to men, so it's easy for this bacteria (once inside) to make its way to the bladder, where it can multiply, damage tissue, and cause inflammation. This is a urinary tract infection (UTI), which can be painful and require antibiotics.
Peeing right after sex can help prevent the spread of fecal bacteria to the bladder and, there for UTIs. This is also why partners should not switch to vaginal intercourse right after anal.