I have two intact boys, ages 6 and 4, never forcibly retracted. No UTIs.
My dh is intact. He was born in Europe and then moved here (Canada), so I assume there's a good chance he wasn't forcibly retracted either. No UTIs that he remembers.
My bro is intact; I don't recall him having any medical issues either. He is 7 years younger than I am, and I don't remember him going to the hosp or being on medication for anything unexplained.
Now, my mom, who is female and not circumcised, gets them frequently. I think so, anyway. I remember her talking somewhat about it when I was a teen, and drinking a lot of cranberry juice and taking some kind of supplements to try and help.