Help me understand

So my boyfriend and I had our first argument and we were finally making up for it the other day and texting about it. English is not his first language so I don’t think he meant it sexually but he said “I have to be hard with you so you can see you are bad” and I don’t know why but that struck something deep with in me and turned me on so much. I surprised myself that it affected me so much because I have never thought I was into that whole “daddy” and dom vs sub thing. Not that anything’s wrong with it I just never thought that was my tune. But when he said that I was so turned on. Has anyone else experienced this? It wasn’t a good situation, we were still slightly arguing so that’s why it also made me confused at myself. And because English is not his first language I don’t even think it occurred to him that saying that would be perceived as sexual.

I guess I just want to understand if anyone else has experienced something like that and what it was like and if you have tried to experiment in that a little bit more. Not sure if I’m into it all the way or what.