Not a normal drive through, but...
One night, on our way home from Boston on the Mass Pike, my wife (then g/f) decided on a little sexy fun and gave me a blowjob while I was driving.
She didn't realize how far we'd gone until I started to slow down for the exit. When she tried to look up to see what was happening, I held her head down in my lap until she went back to work. This was before all the toll booths were replaced by automated, pay-by-mail cameras so the exit ramp led to a toll booth where an older gentleman took my money without noticing or saying a word. By now, my wife knew where we were and knew we had an audience because I had greeted the guy with a "Good evening", but she kept going.
He made change and then smiled as he looked down and watched her head bobbing on me. Then he said "Thank you" as he handed my change to me and I drove off. (I have a friend who used to be a toll collector and he says that this happened once in a while to all of them, but it was a first for me!)
My wife scolded me afterwards but not until after she'd finished the job long before we got home! She said the only reason she kept going on me was because she was too embarrassed to sit up and look at him. Whatever works! Lol!
