What is the attraction of drive-by casual sex in public places with complete strangers? What gives with the almost daily news of large groups of men getting arrested for having sex in public places?
I'm affraid that's just what perverts do.

There's a whole, highly publicised, event up in Sydney each year which features simmilar perverted acts in public!
The reason it hapens, I guess, is that there is too much support for it in public culture these days. (Such acts were much more rare only decades ago)