Things I Hate About TV: sex in parked cars

I'll be quick about this. When precisely did it become unbelievably easy to have sex in a parked car without any interruption? I'd like to think that I've had my fair share of late-night encounters, but never was it convenient to just go at it in the back of the car. Take last night's finale of The Sopranos. There was that one scene where Christopher and Julianna were getting it on in the passenger seat with the ferocity of a couple rabid dogs. But they were right in front of the diner's window! No one says anything. Everyone just continues to eat their greasy food and ignores the make-shift porno ten feet away in the parking lot. Maybe I'm just not adventurous enough. But something tells me that the second I decide to buy into this fable television has spun for me, I'll be spending my night in another place that TV has depicted as being incredibly easy to have sex in - a jail cell.