My boyfriend wants me to douche

So my boyfriend tonight told me he doesn't want to go down on me because the smell/taste has gotten worse... And he said that maybe I should try douching. I have never done it before, and I'm curious what other people use and if it's worth it? And do you use water or a kit? I just started birth control a few weeks ago (and I've had a lot of brown spotting) so maybe it's worth a try to clean it out? Just want some feedback and some of your own experiences. Thanks!