Can you use a condom more than once?

Okay, I know it sounds stupid and that the answer is automatically no, but here’s the situation:

Me and this guy were having sex but neither of us came and we stopped. We made out and etc and we were getting it on again, so we wanted to try again. He said it’s okay to use the condom again since he didn’t cum yet and he put it in his shorts’ pocket.

Was that a bad idea??