Well, she clearly doesn't think of you as anything other than a fuck buddy. To her, you are a piece of meat (only fair, she's a piece of meat to you, right?) What's your problem? You have warm wet spots with none of the inconvenient strings so STFU. It's not like you have any emotion invested in this. It's no different than comparing conformation in a dog show ring, anyway.
That being said, I doubt if I would say something like that to a person I loved/liked/respected and was intimate with. There is just no way to say what she said, in a way that is not dis-ing on you. Talking about your ex's cock being buried in your pussy ... uh, not cool.
No strings/no attachments relationships are fun!