Many times have I had sex in public. Nearly every time I've been caught. A hippy gf and I did it in a deluge of a summer rain against some friends' house, one of whom came out but didn't get involved.
I've done the whole behind a dumpster thing with another gf.
In a minivan with a short term fuck buddy right next to a public park.
On some cliffs in the southern part of the Netherlands.
In some public showers with a girl I was in the mental hospital with and in another girl's room (with that other girl) same place.
In some woods in my hometown and a guy on a mountain bike actually started hitting on my girl. I was a bit too naked and thinking, "Hit all you will; I'm the one getting some" to fight the fucker.
My wife is so reserved sexually, and I don't intend on being unfaithful, but I hope my days of public sex, possibly being caught, are not over.
Oh yeah, I've been caught by cops while in a car before too.
Hell, in fact, my very first time, at 16, was under an oak tree in a public park.
I've almost had as much public sex as other... well, at least a quarter as much.