How do erotica writers get their inspiration?

I'm asking the contributors to Best Bondage Erotica 2014 exactly that in mini interviews on the book's Tumblr. So far, these writers have answered that question along with their favorite sentence or paragraph from their story (I'll be answering soon about my dom with two subs story "Dual Mastery"):

Lucy Felthouse, author of "Clipped"

Annabeth Leong, author of "Eel"

Elizabeth Coldwell, author of "Wearing Purple"

Kay Jaybee, author of "Behind the Door"

James McArthur, author of "No Strings Attached"

Annabel Joseph, author of "The Neckcloth"

Emily Bingham, author of "Pegged"