I feel like I'm missing something ....

So this guy I was chatting with told me he is going to dinner with a guy he is going on a trip with.... (it's a group trip, this guy happens to be the only other local going so they have been hanging out a bit) and he said I would probably think it's weird

I was confused.... I was like dinner is weird?!! LOL.... then he said "Just two guys having dinner"

Later told me he was glad it wasn't coming off weird.

I have no idea, I mean, I am female and I've had many dinners with other females and I am straight. Is this really a thing that is weird to people? Are guys not supposed to eat with other guys?? LOL. Maybe I'm too old or something