 
More candles than I could happily afford, a book on demonology in Latin, a carefully-drawn pentacle and my landlord's smoke alarm disabled.  I was about as ready as I was going to be.  Oh yes... and I had to be naked.
When a girl summons a demon in the pursuit of wealth and power, things immediately start going wrong.  But it's even worse when the demon turns up, and the girl realises what a horrible mistake she's made. 
Enslaving a beautiful, sexy lust demon?  Who would do such a thing?