Your mind is all over the place and you can't seem to sleep?  Yep that's where I am at right now.  I go from thoughts of being with a gorgeous lady out on a golf course green to being out on a dark road below a bridge on a full moon night.  The air is warm with a slight breeze and we are outside the car nekkid.  You can use your imagination from there.  Then of course there's the thought of being on a balcony.  Damn I wonder if a cold shower would work...ugh have to get up in 3 hours...hmmm what to do what to do...

I have those nights all the time..  

Good luck.. and a girl can only masturbate so many times in a night as well.
Sometimes it helps and others not so much....