Distracted driving
One time, while driving my truck, I looked down at the car in the lane beside me. I could see a woman fingering her girlfriend's pussy. I've done that too but not while the car is moving.
Another time, I notice something going on in the car in front of me. There were 2 guys in the front seat. Whenever they would stop for a stop sign, the driver would give the head to the guy in the passenger seat. They would alternate giving head to each other. The guy on the passenger side would give head to the driver the next time. I didn't mind waiting. I guess stop signs mean stop sucking cock.
I use to do the same thing with a friend but not while driving. We would drive down sideroads and park, and pull our pants down to our knees and suck each others cock.