"Jenny," I say slowly, not sure I want to know the answer to my question. "Why do you have one of these cameras on your dresser?" I ask. She just smiles at me and picks up the remote to the plasma big screen TV, mounted on the wall opposite the bed.

"John and I like to role play, you know, to spice up the sex a little," she says, smiling at me as she clicks the remote to turn on the TV. "A few months ago, John got the idea to video our role plays so we can watch them later," she says, stepping over to the laptop computer that...