The poor guy could never win with that question though, could he?
I mean, he's been with a few different girls as you said, and who's to say that you had the best body of them all? I know that my body isn't as good as some of DP's ex girlfriends! But he split up with them for a reason, and he loves me for a reason. It might not be because I look like a supermodel, but so what?
We have a bit of a silly thing between us where he will see someone in a film or something and say oh my god look at her, she's so pretty (I do this to men, too, so it's fine) and then I say 'Surely not as pretty as me?' and he says 'No darling, nobody could ever be as pretty as you!' and kisses me.
He says that because he knows it's what I want to hear.
Both him and me know it's not true, and we make these comments jokingly.
I would never expect him to seriously claim that I have a really good looking body, because I don't, and it's just the truth of the matter.
I'm not sure I see your problem!