My partner has exactly the same view as the OP's man: he's not controlling and would never tell me what to do, but he's expressed that he is uncomfortable with any situation in which there are other men potentially checking me out. I like this attitude.
I think its wanky middle class bollocks to do this whole "everyone should be SO relaxed about everything and we all sit on a nudist beach and chat over hummus together and I'll high five the dude who checks out my wife's tits". Controlling is bad, but if you spot it, dump him?
I wouldn't want my partner not to be possessive and have an opinion about my male acquaintances when we got together? I made the choice to re-jig my male friendships when I got into a monogamous relationship: because I'd rather have the partner of my dreams than be the "oh yeah I've got lots of male buddies to hang with, aren't I lucky?" type.
The point of getting into a serious relationship is you're giving up some freedoms in exchange for someone you feel is worth it:otherwise, why bother? The whole "but when I'm a couple I want to do everything I did before and if they REALLY love and "get" me they'll agree" is the kind of attitude espoused by people who end up with phonebooks full of low calibre people they've dated but not one solid partner?
The kind of men who are "well yes we'll both have loads of opposite sex friends, I'll run round at parties making new girly chums and my bestie will be some woman I used to date who dumped me, and you can flirt with whoever you like in exchange" are 100% certified wet and not the kind I'd want to be in a 1-1 relationship with. My man and I BOTH redrew boundaries when we got into a relationship.
I got something I wanted 3 years ago, and I hope my man did, too. Why would we NOT want to keep that to ourselves? That's jealousy, yes. I'd be worried about the strength of our connection if some jealousy wasn't there. I'm not too fussed about him naked (although he is very cute) but I wouldn't want him having intimate conversations with anyone else: those are "mine"? It's not that I see those conversations as a prelude to him having sex with someone, its just that I don't like sharing things I actually want?
So I'd think the same about my body. If he started being controlling and it was detrimental to my life, then I'd finish things, but he's not so I don't see the issue.