What is drive in porn movie?

A porn movie that is shown outside on a giant movie screen and you sit in your car and watch it. there is a lot more privicy in a car. You can jackoff, fuck someone ect. while you watch it.
There used to be a lot of drive in movies but not for porn. Now they are switching to porn and more are being built.It is a great porn experence to see it on a giant screen ect.