Can having sex with a man with a large penis give you a bladder infection?

Sure: Bladder infections are not uncommon after intercourse.

Any sex might: The physical location of the urethra ( opening to bladder) is just above the vaginal opening. Any sexual activity can drive germs into the urethra and allow their entry into the bladder, resulting in a urinary tract infection.Solo or partner related sex can do this in susceptable women. Those with the susceptability can reduce the frequency of infections by urinating after sex.