I'm on a baseball team and one day after practice I felt really horny because there were tons of hot chicks looking at us play. I wanted to just get into my car, drive straight home, go up to my room, lock the door and undress and wack that thing hard!
I got into my old 1987 Ford Truck, which isn't very big, and was ready to drive off. But the stupid truck just wouldn't start. I tried it a couple of times but all it did was start up and die off a few seconds later. I took my foot and revved on the gas pedal to get the engine warmed up. The vibration of the engine caused me to get erect and my boner was so hard!
I just couldn't hold back the feeling, and I unzipped my jeans and took my dick out of my boxers and stroked it, while my feet revved the engine. Within minutes I cummed all over the place in my truck and it was so messy. I felt great. I looked outside my window and I noticed the same two hot chicks who were looking at me play baseball had seen what I had done. I revved my engine again, cleaned up, waved at them and drove home.