I have always loved quickies.
The thrill and the rush of an impending public scandal, the danger of the place you have choses to execute your little "crime" in and the fear of getting caught all adds up to several minutes of unspeakable fun and ecstasy.
From school to the office, from bars to parks, from cinemas to toilets and to every forms of public transportation, every place is a ripe venue to do your quick, dirty "crime".
Quick public sex is a unique biochemical reaction within the body. The fusion of the "fear chemicals" plus the "sex chemicals" in the brain adds up to a one unique physiological experience.
So go ahead, do it at your own risk. Just make sure you don't do it in an Arab country where sodomy is considered a serious crime.