But, a New York court has ruled that sex in a car was not sex in a public place unless the act could be readily seen by passers-by. (People v. McNamara, 585.
Public sex is sexual activity that takes place in a public context. It refers to one or more persons committed only if the participants are seen by others, so that a sex act may occur in a closed toilet cubicle without an offense being committed.
Defined on its surprisingly steamy Wikipedia entry as sexual activity taking place not in an entirely private context, having sex in a public place.
Having sex in public places is everyone's secret fantasy. Here are the 10 best places for outdoor, public sex and how to not get caught, from sex.