vaginal infection

But they wouldn't sell douches if they were bad, right?

My boyfriend is convinced that I should douche. I have told him about what I've read on this site about how bad they can be for you but he argues that they wouldn't exist if they were that bad. I have recently had 2 UTIs and 2 yeast infections within a couple of months so now I am wondering if maybe he is right and that I should douche......