R+B singer Brian McKnight is such a huge fan of having sex in the backs of his cars, he's written a song all about it.

McKnight's new album U Turn features a song called BACK SEAT (GETTIN' DOWN), in which he croons about taking his love to the rear of a vehicle.

He explains, "I've owned 30 cars over the last 10 years, and there was a back seat christening point with each - even the PORSCHE. The only car I didn't do it in is my FERRARI."

McKnight says the idea to "take it to the back seat" is usually that of his lady friend.

He notes, "For some reason, grown women like to be in a situation where they might get caught.

"I have no idea what the deal is. I'm 6 feet 4 inches. I'm not trying to get in the back seat of anything. Luckily several of those vehicles were SUVs: RANGE ROVERs, a NAVIGATOR."