I have a very vivid imagination....so I will let you in on some nice ones....
-usually my wonderful girlfriend she is so good I rarely need to masturbate...but we live in different states
-I think about totally unreal situations like going into a restaraunt and having the waitress show me to the back and things like that
-bondage is a happy thought
-I also love to picture women masturbating it is perhaps the sexiest thing on earth

those are some of them I can't wait to read everyone elses reply