Back in May, I hooked up with this guy who tried to sit on my dick without a condom. I was shocked. For a split second I thought, "maybe just this one time..." because we didn't have any condoms and I really wanted to fuck him. Then I thought, "Do you want to throw away your life for this?" and I made him get off.
Later that month, I hooked up with another guy, and after fingering his ass for a while (without gloves, stupid me), I asked if he wanted me to fuck him. He said yes, and started to guide my ungloved dick towards his ass. I said, "Wait a minute," put a condom on, and then fucked him.
Then I got together with the first guy again, and I fucked him wearing a condom. A bit later on, he tried to sit on me bareback again. I told him I'd fuck him again if he wanted, but I needed to put another condom on. He said, "Why, you're not going to come again, are you?" I said that I might, but what I was really thinking was, "What does that have to do with it?"
So, I'm fairly certain that both of these guys are having sex with other people, at least some of the time without condoms. Methinks it's time for an HIV test.