He couldn’t stay hard because we used a condom?

I was hooking up with this guy I met at a party and at the beginning of the night he had trouble staying hard because of the drinking, which is understandable.

The next day when we went for morning sex, he kept trying to have sex without a condom. Like position himself and I would have to move and say not until you get a condom. We had sex and it was pretty good for me, but I noticed when we switched positions he didn’t stay hard. This happened twice.

He told me he couldn’t feel much and hinted more about not using a condom, but I said no (I don’t want STDS). It started to annoy me.

Is this something that’s common for guys that might be used to raw sex and move to condom? Or is he just trying to trick me into raw sex?