"Head scratch" is a phrase used to describe when someone is confused or puzzled by something, often causing them to touch or scratch their head while trying to figure it out. Full definition
At 80 minutes it's just about the right length (any more would have gotten tedious) and it's likely to provoke laughs, outrage and head scratching in equal doses. (hoopla.nu)
It's super nice to come home and have this entertaining grey creature running around looking for head scratches and a friend to play with her rainbow ribbon - tail. (heavenlypets.org)
The 90's trends are definitely some of the more head scratching ones in recent decades, but they're definitely starting to make their way back again. (adashofpretty.com)