Wonderflonium, yes, it was a co-worker/friend who said it to our lunch group one day, right in front of me. She was a piece of work, yes.
Mopsy, Kareng57, you may well be right. I can be oversensitive wrt the subject matter, it's entirely true. Perhaps I should have mentioned - this was not someone I really knew, it was casual conversation with someone I had just met a few hours beforehand. I got kind of an elitist vibe from it, kind of a "pure blood line to nobility" kind of subtext. If the remark had been built around "and I've inherited x type of values" or "learned y kinds of lessons" sort of thing, but it was purely about bloodline. And that makes me twitchy. I wanted to bring it home to him that when he said "Not a lot of people can say that" that he really was inappropriately bragging to folk that might not have anything at all in that regard. We wouldn't brag about a six figure salary to someone. One reason is that you never know if your interlocutor is on foodstamps. Why then would we make a point of bringing up an exceptional genealogy in casual company? I fully admit my reaction was not that of exquisite correctness, or very high-minded. I wanted to bring him back down to earth as to how that sort of self affirmation could be received by someone that didn't have access to those kinds of records. The state that I was born in does not even recognise any kind of legal right for me to know even medical records or heritage. Perhaps indeed he wasn't "behaving badly" but I would still say that it can be a sensitive subject matter for adopted people and a bit of a gaffe to make a big deal out of it.
As for infertile couples saying they could never adopt: It's not so much the fact that they're not up to going that route, it's making a point of saying so to an adopted person. I have found it hurtful. In fact I think I'm going to do a spin-off thread about that, as I think it's worth a discussion of it's own, and something that has come up for me more than once, and surely will again. I'll appreciate hearing other views. Look for it under Children and Family, I should think.