Here's one to make you ponder. Taken from Every Man's Marriage, added to by me so that the context makes sense.
"In our role as spiritual leaders, when it comes to the bedroom we'll find no other place in our marriage where it's more important for us to think Christianly - for her sake. Yet there's no place where we're more willing to stretch Scripture for our sake." - Every Man's Marriage, Arterburn and Stoeker.
Highly, highly recommended.