Yesterday, I took my car to the car wash. It was absolutely disgusting, and I did not feel like spending hours trying to clean it myself today. My dad is thoroughly against car washes. He believes that if you take your car to the car wash instead of doing it yourself, you're being lazy and wasting money. I don't see how $10 plus the $2 I saved when I put gas in the car for not wasting at least an hour, probably more, of my time, is wasting money, but anyway, because of his opinion, I just decided not to mention it.
He came in today: "You took your car to the car wash, didn't you?"
And there we have it. Conclusive proof that he is about as obsessed with the condition of my car as I am.

Surprisingly, once I told him that it didn't cost much and I got a discount on the gas, he really didn't say much.