“I don’t use bumper stickers on my vehicles. I think they attact vandalism.”
I grew up with car enthusiasts, clean cars, highly detailed to bring out the beauty of the design. I’m not extreme in that regard but some of that rubbed off, my cars have always been clean and vacuumed. On date nights, many of them said “Wow your car is really clean.” It was even clean under the hood. It’s just a thing... bumper stickers? Pshaw! Never.
I have a friend who keeps his car spotless. He never allows anything inside the cab of his car. Everything gets placed in the trunk until he gets to his destination. There isn’t even a piece of lint inside his car... ever.