My father likes to make outrageous suggestions, and then complain that YOU are the unreasonable one for not thinking they were good ideas. For years, whenever we would drive past a Hooters (for those not in the USA, it's a bar and grill where the waitresses all wear very revealing clothing) he would say, "We should go there for dinner! Haw, haw!" Please understand that he's a lawyer, my mother a professor at a religious college, and both he and my mother are speakers in their church, so in their world, Hooters is considered Not A Polite Place.
I finally snapped. We were driving down a street with a number of restaurants, and discussing dinner options. There was a Hooters, among about 10 restaurants, and Dad once again said, "Let's go to Hooters! Ha, ha!" So I said, "OK," and started to pull into the parking lot. Well he just about stripped the gears on his tongue,he back pedaled so hard. I pointed out that I didn't mind, I'd heard their food was good, DD (age 1) was eating food that I had packed, so no problem. DH backed me, bless him, and Mom figured out what we were doing and said it was fine with her. Dad finally said he was more in the mood for steak, so we went elsewhere.
He hasn't mentioned Hooters in the last 7 years, now.