Anyway like another person in this thread mentioned, while it's shit, at the same time it feels nice to get complimented on a feature of yours, especially if it's a novel experience. I've never felt like I was particularly attractive, because I got zero feedback on my appearance during my formative years - good OR bad. But I'm in my mid thirties now and my girlfriend has the hots for me, so that's nice :D.
I know the context is largely missing, and I am obviously not telling the OP what they should think in a specific circumstance.
But as you say, objectifying is when an individual is seen only through the prism of a stereotype (though I don’t think it’s necessarily physical, but that’s another story). We tend to get very defensive because we reject others’ judgement (and crave validation at the same time; we’re nothing if not contradictory), but a compliment every now and then is not necessary wrong.
And I know what objectification means ;)
I recognise myself in the rest of your post, it’s uncanny. Are you me?