I saw a urologist years ago about my recurrent UTIs. He explained to me that my constant infections had changed the shape of my uretha, and that it was now easier for bacteria to collect there. I had a cystoscopy, which solved it for a few years but then I started getting them again. I've taken a prophylactic antiobiotic ever since. I don't like being dependent on antibiotics either, but (possibly too much TMI here) unless I stop having sex I'm unlikely to be able to stop taking them any time soon!