Peeing after sex may help prevent urinary tract infections UTIs. UTIs occur when bacteria enter the urinary tract, usually through your urethra, and travels to your bladder. If you have a vagina, your urethra — the opening where urine is released — is close to your vaginal opening. Peeing after sex can help flush bacteria that was introduced during intercourse away from your urethra. Peeing after sex is the least beneficial for individuals who have a penis.
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