“Mutual weirdness” sounds like something that might give you superpowers if you fell into it.

“Hey, do you have anywhere I can wipe my feet off before coming in? I stepped in some mutual weirdness on my way to your house.”
“Ick. Yeah, there’s a mat out there you can use – no, not that one, the other one on the step. I don’t want the dogs rolling in it.”
“Sure thing.”

I’m ridiculous. This is really sweet. <3