In a hotel room with two beds while your friends are there too.
Two words, people:
In a locker room.
Inside an old deserted house.
The woods behind his mom's boyfriend's house, a ditch, backseat of my car behind a business, my car trunk in a parking lot in broad daylight, his shower, his sex lid bed, his living room floor, his couch, etc.
In the file room at work—there is just something about the thrill of getting caught.
If you have tinted windows, the world is your oyster!
In a hotel room with the curtains open.
But I love baby oil!