One afternoon I was out with my friend Geoff for lunch. While we aren't and have never been a couple, we've been friends for 16 years and are occasionally (and understandably) mistaken for one.
When the waiter came and took our order, I ordered a steak and Geoff ordered fish...I think it was basa or salmon. My order came with an appetizer of soup, Geoff's came with a salad. When the waiter brought our appetizers, he automatically handed me the salad and the soup to Geoff. I said something like, "Sorry, the soup's for me, the salad is his." The waiter gave a surprised, "Oh!" and switched our food. I decided to interpret his surprised sound as "I can 't believe I got their orders mixed up, that never happens!" as opposed to "Well the woman at the table MUST be the one with the salad, right?"
Then our main course came and wouldn't you know, the waiter tried to hand me the fish, and Geoff my steak. This time Geoff was the one who spoke up and he said something like, "The fish is mine; she ordered the steak." Again, the waiter seemed genuinely shocked that I would have ordered the more...manly?...soup, steak and baked potato. The waiter cleared up any confusion quite decisively when he said, "Sorry, it's just that women usually order fish and salads, not men."
What does my gender have to do with the food I like? Sheesh.