Ladies and gentlemen, I give you the "Flare-O-Flame"! Here's one of those mail-order gadgets that I haven't come across before. Don't even remember ever seeing them in the old J.C. Whitney catalogs. But most importantly I can't remember seeing one in the @Moriarity collection.
You won't get the girls with those things but a necker knob and sex lights should be on your shopping list.
Take a bicycle tube and cut slots along it then cut it about 18" long and put on an exhaust pipe, makes a cool loud raspy sound. Do it to a friend's car or the wife and watch their face when they start their cars and go to drive off... ...
That's sort of what I figured. It would end up sounding like a continuous, variable-speed, internal combustion "whoopee cushion"!