The only thing I can think of is having sex once under a bridge by the main highway in a town I used to live in. The other is having doggy-style sex with a girl in the middle of a baseball field in a public park. It was dark but some people were still around in the distance.

Oh yeah. Once, while at that same park on a Saturday afternoon, me and a girl had full on sex but under a blanket. With people and families close by.

To be young and too horny to think straight [gulp!]