I like wine. I know about wine. When out with my partner I order the wine, taking into account our likes and dislikes and what we are ordering (as well as the price). I refuse to drink bad wine. I can tell the difference between wine that is corked, past its optimum drinking date, has been oxidised etc. and that which is simply a bit tight on tannins or needs decanting to bring out its best, etc.
Thus, it pisses me off no end when I do this and the waiter asks my partner to inspect the bottle (correct wine and ullage) and the cork and taste the wine (which is the appropriate protocol). He is actually terrified of having to make the decision, so we have a deal that I go to the ladies before we order or after the wine arrives, but never after I have ordered the wine and before it arrives. When asked to taste he simply says 'I defer to my partner's better knowledge of wine' - and motions in my direction. Then, when I say it is OK, he says 'and now you're supposed to fill my glass first :)'.
I have only sent wine back once and they were awfully snooty about it. There have been other times when the bottle has started on a good note and then 'gone flat' on taste before the end of the meal. There have been times, particularly in Indian restaurants, where I've looked at the menu and said 'ugh - I think it's Kingfisher tonight!'. I also don't bother tasting a lot of 'drink now' wines in screwcaps because the chances of anything being wrong are awfully slim (but I do make sure they have the correct bottle).
But on the subject of this thread - yes it is sexist. It is based on a whole heap of gendered assumptions. Yes, it does annoy me. And don't get me started on giving him the bill. We divide it up strictly according to what we ate and we each pay our bit. Again, there are gendered assumptions there that really, really annoy me. Plus, mine is always cheaper!
Yes, it's a little thing, but it is in the order of everyday sexism and it all adds up, as well as in micro ways reinforces gender roles and gendered assumptions.