Mark obediently moved his head over and began licking my right foot. The shoes I was wearing had straps across the top and didn't really show much more than my toes. I definitely felt my feet needed more attention than the straps allowed.

"Untie the straps so you can take my shoes off and do a proper job while you're down there."

I got another dirty look but Mark sat up on his knees and reaching behind my knee grabbed the thin piece of leather dangling there. With a swing of my arm I contemptuously slapped his hand away.

"Use your teeth like a good little doggie."

Mark took a...