I don't even know what this is. Slapping your own forehead?
if we are thinking the same, and i had to google it by the way. and there's not some sexual innuendo here that i don't know about.
i've seen my husband make this gesture, laying his face in his hand and he's usally shaking his head at the same time.
he does it when i do something ditzy, it's like throwing his hands in the air.
so thats my take on it.
Thanks. On my last post some guy said "oh my lord facepalm"
I didn't know this was something only men did.
I think many of us gesture but just don't realize we have done it.