A fairly attractive woman, hidden behind glasses and a conservative appearance, who unleashed you know is just a dirty, naughty freak!
Rick;
Well, look at that dirty librarian over there!
Dave;
Haaaa! That sounds like a sex move! I call it!
A sex act where the woman or respective bottom reads a book while the man or respective top has sex with them in an attempt to disrupt their reading.
I gave my girlfriend the dirty librarian last night while she was reading