Um I personally know many straight people that get it off by doing it yes sex in public. Theam park kiddie rides, library, theaters, airplanes, subways, park, hotel pools. anywhere!
Personally I think straight couples have a lot more PDA, not light making out, but really phisical stuff a lot more than gays, proably just becasue there is more of them.
What would you be thinking if that couple was straight?