That's what I say. why complain?

I wonder if he called her a nympho?

His own fault.

Now let's reverse the sexes and see how these comments go...

OP is not a smart man

Too late for that.

If I were in her shoes, I'd be embarrassed and/or offended. I've had my boyfriend say similar things and it really stung. I, of course, retaliated out of hurt, but later realized he hadn't meant to hurt my feelings. The subject of sex tends to be sensitive.

Why not ask what he meant? If my SO said something like that to me I know I'd ask what she meant and if she wanted to slow down. Not assume she's being offensive and not say anything, which would spiral it out of control.

I personally think completely ending a relationship over an overreaction, is in itself an overreaction.

If it's to the point where it's no longer interesting then it is time to say something. OP probably could've brought it up more gently, but it is possible to have too much of a good thing.

Also if it's becoming the only thing they do together as a couple, that could be a big problem. I'd start to wonder if my partner just lusts for me rather than loves me if sex is all we ever do.

there is no such thing as too much sex..

When you start to get road rash on your penis, you're having too much sex.