licky,you make a really good point,and its a situation we have encountered of the problem is in the fact..........no,i wont go down that route,i'll tell you a story instead......................two months ago,at our usual spot,we were having fun...not too many guys about,four at the most...now,my vehicle,bieng a long wheel based 4x4,had ample room in the back,with the rear seats folded down,so we usually blanket it all out,nice and ,i'm in the back with mrs d and the master,and,illuminated by the two interior lights,we are giving it our best,well my best still aint that good,but you get the picture...now,we are aware of faces against the glass,shadowy figures circling like sharks in the things are getting a little steamy inside,and can see the dropplets of moisture when backlit by main beamers,but nothing suggested that the visibility had become impaired,until the show was over,and i clambered out into the chill air,where i was greeted with "you idiot",not really the reaction i was expecting,but on explanation,and inspection,it became blatantly obvious that the guys couldn't see a thing!!..as it was,we then did a repeat performance with the door open,as the poor fellas were most polite,and frustrated..so yes,its something we have to consider at this time of year........................................................................................................................................................let me just tell you about "truckstop" quickly,then i have to go....."truckstop",as the name implies,is a commercial driver,and,has to be the unluckiest dogger i up for an overnighter,at a well known dogging spot,he glimpsed a car,interior on,and well steamed "truckstop" isn't the sort of guy that wades into shows,but on this occassion he thought he was onto a dead cert...there were creaking noises eminating from within,but he couldn't see a down,he pressed his face against what seemed to be the only clear spot available,when he raised his hand to wipe the glass,all hell broke loose!!!...the occupants,oblivious to the nocturnal activities of the carpark,were enjoying a bag of chips,hence the they were a rather large couple,and needed to adopt a pendulum motion,in order to gather enough momentum to propel themselves from the vehicle,this delay gave "truckstop" the neccessary time to make good his later said he could still hear her screames a mile down the road!!