Sex is an intimate thing for many people, so that's why they try to seclude themselves when there is an opportunity to have it. Not every guy and girl is brave enough to practice sex in a public place. The realization that someone might catch them, makes the sex partners even hornier. Such adrenaline increases the pleasure they receive from public coition. It is safe to say that they will never forget such an unusual experience. Sex in public places makes routine life more interesting and spicy.