[Still snickering -- he can be as grouchy as he wants, and Mephisto will still enjoy it either way. Hell, he might even find the grouchiness more fun.]

You certainly don't seem the type, no. Had I any inkling that you might somehow betray my trust someday, I would have never agreed to a clause in which I cannot lie to you.

There are very few types of people I would trust with that much power over me.