I like:

Definetely sex! sideways, in a chair. backwards. twice. from behind. on top. for hours. upside down. horizontally. standing up. in a bed. on a table. in the shower. hard. fast. in the dark. in a pool. cowgirl. against a wall. in a closet. during breakfast. in the car. at a park. in the rain. harder. faster. now. again.