Sex is a perennial topic on my blog because of how obsessed we are with the subject and how bad Christians are at taking about it. It’s all black-and-white, perfect-or-not. I'm not sure I'm much better, but I at least want to start a dialogue. The way Jesus defines healthy sex when he speaks about marriage is that it is best in an exclusive relationship, between two people, who are committed to each other. You can probably proof-text your way out of these basics, but I think, for me, the proof is in the pudding. It's not about learning how to justify what I desire, but trying to get what God desires to transform my desires. Practically, I think sex works best when we are doing it the way Jesus advised.