Where's the naughtiest place you've ever had sex?

My boyfriend of 2 years just passed the BAR in July and got a job as an attorney at a luxurious law firm. He "showed me around" and we broke in his new office, including his desk. The other lawyer was showing him how to use the new computer software on the desk today. 😇 It was at 8pm at night and the other 2 lawyers were long gone.

Where was your naughtiest place?