To have found this rude?

[Cheeseboards]

I was in a pub with my partner, he loves striking up conversation with strangers in pubs etc. So started talking to some man who was stood next to me.
The guy asked my partner what he was drinking and he said. Then the guy went to my partner, "Is she drinking a coke?" About me.
I said, "Yes I am."
Then he said to my partner, 'doesn't she drink alcohol?"
And I said, "No, I don't."
Then he asked my partner if it was still fun when the other person didn't drink.
After that he left. I found it so rude that he kept saying 'she' and asking my partner about me like I were a baby or a pet.
Told my partner this and he said the guy had done nothing wrong. What are your thoughts?

Yes sounds rude.. very infantilising to speak to DH about you when you're stood right there. I would just forget about it though

Told my partner this and he said the guy had done nothing wrong. What are your thoughts?

One of the more distressing aspects of 'oblivious' everyday sexism is when we discover it in men we are close to & had believed were better than that.

It's possible he simply cannot see it.
However, having had it pointed out to him - in the simplest terms ffs! - the fact that he is now either refusing to, or unable to see it, must feel very off-putting.

He either realises, but doesn't want to concede a point to you. Which is unattractive.
Or he still doesn't realise, because he's thick. Which is unattractive.

Sorry this has happened OP but at least you can now find out what you are dealing with.
Have you tried relaying the experience back to him, with the sexes reversed, & him as the 'object' of discussion between you & a female stranger?

Extremely rude, but unfortunately some men are used to women being talked about like they’re possessions.

You'd forget that your partner participated in an infantalising discussion about you with a stranger, & then doubled down on his position when challenged?

Blimey.

I'd be having the "come to jesus" conversation about this, & ditching him if he couldn't/wouldn't see the light. Life's too short to tolerate unaware, unintelligent men.