I've gotten road head a number of times in the past. One of my most memorable follows:
One night, driving back home from Cape Cod, MA, we were driving west on I-90 (Mass Pike) and I was getting very tired. Trying to keep me awake and aware, my girlfriend (now wife) kept telling me stories of her past sexual exploits. I was getting pretty horned up and she noticed me constantly adjusting my hard-on. Since her stories were also affecting her, her juices were flowing too.
Finally, she offered to "help me out" with my problem. She unzipped me, took out my cock and began to go down on me. I drove a mile or two with my cock in her mouth. She was getting into it so much that she didn't notice that we were approaching our exit until I started slowing down and turned off. When she started to lift off of me, I told her that I was too close and she couldn't stop now! Besides, it was night and no one could see inside the car. So she continued.
At the end of the exit was the toll booth. It was well lit and the booth was manned by a young man who was supposed to take my ticket, charge me the correct amount for the distance, and then let me continue. Well, as I approached, I guess my GF had her eyes closed and was going to town on me and didn't notice anything until it was my turn to pay and I pulled up to the booth. She tried to pull off of me, but I held her head down in my lap. To my surprise, she didn't stop but continued to bob her head up and down on me at a fast pace.
I'll never forget the look on that young man's face. The interior of the car was well lit by the flood lights in the area, and his eyes bugged out as he watched the back of my GF's head bobbing! I held up my ticket and waited for him to tell me how much I owed, but his eyes never left the back of my GF's head. He took the ticket but never said a word. He must have hit some button inside the booth because I noticed the red light in front of the car turn green. I said "Thank you" and slowly drove off! I can't believe he'd never seen this before on the job, but maybe not.
Unfortunately, some years later, while driving on a winding back road, my wife tried to give me road head in an old van we once owned. She got so motion-sick while doing it, that she has never attempted it again! Its been maybe 15 years since I've gotten it!