I've had sex sort of in public 2 times, once in the forest drunk while camping about a quarter mile away from camp, we were caught by a few other campers walking by, it was nighttime and they somehow didn't seem to understand what was going on and proceeded to talk to us for a few minutes.
Another was on the shore of a small pond near my parents house, it's in a neighborhood and was in the middle of the night, I came so fucking quick because the excitement and fear of getting caught was so high.
I have gotten blowjobs in my car a few times, in daylight, once outside of a college, once outside of a church, once while I was driving, those were pretty fun too. Love public sex, might be my number 1 desu. Hate sluts though,. all of the above was with a girl who I thought I would marry.