Well with all the theorys about Dreams being connected to your life in some way, im sure that they are....but just how is weird. It could be as you said "help us to prepare ourselves for the future occaisions of sex or for that matter any of the lifes problems???
Or could just be a way of your subconcious trying to tell you soemthing...on that note my girlrfeind has had some weird dreams,(One was about another guy, in which she dated in her dream which made me worry!!)
now i really want to know what they mean????
Why dont pot smokers dream as much as non-smokers? for me when i use to smoke (rather reguarly)pot i never can remember dreaming, now i can atleast remember my dreams though..