I just get the "itch".  Not really the little head driving me, but something internal.  I imagine it is like being an alcoholic and getting that twitch that you 
must have a drink.  At times it will hit me out of nowhere.  One minute I am working, driving or just watching Sports Center and BAM, I gotta have some good lovin'.  I simply crave the encounter of a beautiful, sexy woman, who is there for the sole purpose of making me happy.
Oh yeah, the little head doesn't seem to mind my satisfying the "itch"...  