If you live in a metric country: Do you use the terms dozen and half dozen?

My husband hates when someone uses the terms dozen or half dozen, because he says he needs to pause to convert what that means. He says it’s because he grew up in metric. I don’t think of it as a metric thing. Is it? I think it’s because he is ESL, or maybe Mexico doesn’t use the terms. I don’t really know though, I’m just assuming my husband is making no sense. LOL. For me, dozen and half dozen doesn’t take translation in my head, they just mean 12 and 6 respectively. Like saying angry or mad in America.

Forget the term bakers dozen, then he’s pissed. “Just say 13!”