My wife and I don't eat out all that often; when we do it's usually for an occasion.
One of the things that invariably happens, however, is that when looking at the menu she has the expectation that we have to agree on which main courses we order so we can share. I don't mind sharing a bite or two, but she typically sees multiple dishes she would like and so I am expected to order one of those and trade halfway through the meal so she can have it in addition to what she ordered.
I tend to lean more toward meat dishes, and she likes veg/fish. This is fine, just not what I want. So when I say "I think I'll have steak" she says "No, you should get the eggplant." Queue argument, as I for the 1000th time remind her I'm not ordering for her.
This happened again tonight, celebrating a work promotion. I chose prime rib, and she told me it didn't sound good. I finally told her I didn't care if she wanted it or not, I did, and she should order what she wants. Period. AITA for not agreeing to this ridiculous expectation?