What are all reasons to get BV?

Answer:
BV is an imbalance of bacteria in the vagina. Since sperm is basic and not acidic, having ejaculate in the vagina increases the pH and causes BV. Some women have BV without sexual intercourse, and for some reason the normal vagina flora is disrupted. It is not known exactly what causes BV in some women.
First answer by Rjsiekman. Last edit by Rjsiekman. Contributor trust: 359 [recommend contributor recommended]. Question popularity: 2 [recommend question].