Exceedingly random thoughts

Why do cats lift their butts when you pet their backs? Yesterday I had an entire conversation with a man next to me in line at the Friendship Heights Whole Foods, yet although I believe we were talking about the almost-complete lack of cell reception there, I could not understand 99% of what he said. It was bizarre. No, he was not foreign. He was smiling maniacally and speaking American English with a combination of mumble and rapidity + a bonus weirdness that led me to miss the entire conversation but nod agreeably the whole time. It was a strange experience.

When people drive with their blinkers on, even as they go in the opposite direction of the in-use blinker, why is that?