This is kinda bad for Hairu :\

Is there a tag for when a woman puts her hand on her head during sex?

It's also present in this post (also by Hairu)
http://danbooru.donmai.us/data/9bdabb147d569358e5c0fb035969b1d1.jpg

Great, a perfectly good picture ruined because there's a penis in it

facepalm would fit