When people don't get innocent and obvious jokes.
Some years ago, a co-op parking garage was started in our neighborhood. The idea was that you'd 'buy' a parking space and then pay a monthly maintenance fee. At the same time, rents and prices of co-ops or condos were going through the roof.
One evening, when out with friends, I quipped that it might be a good idea to buy a parking space, a good-sized RV and move into the garage. Of course, I wasn't serious but one of the other women in our group went ballistic. I was quite loudly informed that to do such a thing would be totally illegal. The information was delivered with great sighing and rolling of her eyes at my stupidity.
There is also a street vendor who has sells nice earrings at a reasonable price. The pairs are
mounted on pieces of jigsaw puzzles. When I was working, I'd buy a few pairs a week.
I once joked with the vendor that, if I bought enough earrings, I'd get a whole puzzle. We both had a little chuckle about that but another woman who was shopping informed me, in a pitying tone, that,
'Honey, these pieces don't all come from the same puzzle'.
Ooh, I hate that. (and those are funny quips, btw)
On my 2nd date w/ my now-DH, we went to the aquarium. Right inside the door was the glass wall of a tank that held beluga whales. The whales were hanging out, w/ their bodies hanging down in front of that window, and right about head level was the whale's navel. A big old belly-button, just like mine (only MUCH bigger). I was so surprised! I blurted out, "Whales have navels!" (well, I know they're mammals, but I never really thought about it)
My date thought that was so cute. He loved to tell that story. He was telling it at some party where I was being introduced to his friends; the sister of the hostess got really scornful. "Of course, they do, they're mammals." I said, "well, I know, but I just never really think about belly buttons except on primates. I never really noticed belly buttons on dogs or cats, or horses. This looked just like a person's, and I'd never been in a position to see it before."
You'd have thought I got even more stupid, the way she went on.
I concluded that she had decided to dislike me and make me look stupid no matter what I did, based on her superior smirk and further interactions with me. I got really, really patient, and then just stopped talking to her or looking at her.