You want a serious answer? Well, you would have to drive long haul truck for a significant number of years of your life to ever understand fully, which I have done, and during the years the echo, roger beep and the creaking bed springs and aroused woman gasping sounds first appeared. To be roaring down the highway late at night and hear these things coming from my radio on long lonely nights, fighting white line fever, well, the answer is deceptively simple. We did it from boredom, to relieve mind numbingly, baboon shrieking, insane making, boredom. Some of the sounds coming from my radio could make me go into fits of roaring laughter for a half hour at a time. They can wake you up, keep you going, help you make a schedule, help you make the next truck payment, just fight the boredom of the open road. That was reason enough.