I'd say the way our brains can predict song lyrics before they're even sung! Like, you're jamming out, and your brain's already two steps ahead, singing the next line before it even hits your ears.
Apparently it might be good for period cramps, but because it wasn't tested on women during the development phase (because wimmims cycles be distruptive) and nobody has ponied up the money for a proper study, it isn't prescribed for us.
I'd say the way our brains can predict song lyrics before they're even sung! Like, you're jamming out, and your brain's already two steps ahead, singing the next line before it even hits your ears.