Sometimes, women get a yucky infection called bacterial vaginosis, or BV, in their vaginas.
Doctors used to think it wasn't spread like a cold, but a new study says it can be passed from men to women.
They studied couples where the women had BV; some couples both got medicine, others only the women.
Guess what? When both got medicine, BV came back less often! It's like teamwork to fight the germs.
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