Link
http://i.imgur.com/xjF6KRL.jpg
more drawing xxx pictures in category rule34feet
from #thread (https://reddit.com/r/rule34feet/comments/4o8bpu/footaday_392/) by @Darthdunne
I finally found the source. Foot in the back of the head! (source in comments)
imgur.com category @sayitlikeaGoodGirl