I do too. I'm especially horny when driving partly due to stress where I need to pull into a parking lot, get my pants down for complete freedom, and just do it right there. I keep a worn out t-shirt in the car to shoot my sperm into in a full body passionate orgasm. Having the t-shirt right there lets me 'go all the way' without having to stop for fear of making a mess in my pubic/thigh/stomach or chest hair. I just wipe my penis, compose myself, pull my pants back up then get back to what I have to do.