So, my SO and I have been together for five months now. I'm 20 but this is my first relationship. He has had four previous partners and isn't a fan of condoms. I got an IUD recently but we've been fighting about whether or not he should be tested. He says he was tested a year ago when his last relationship ended and was clean and hasn't had sex since. Should I ask him to get tested again? He believes that this means I don't trust him but I just want to be on the safe side for both of our sakes. What should I do?