Crack Kills

So last night, I was laying in bed with the dogs, and my husband comes in and kneels on the floor next to the bed. He laid his head on the bed and was petting Gidget. I looked over the edge of the bed, and I could see his booty crack, so I told him that I could see his booty crack, just so that he was aware. I'm really helpful like that. He says so what, I see yours all the time. NICE. We're THAT couple.

Anyway, it got me thinking. You know how there is a regular name and an appropriate medical term for most parts of the body? What is the Proper and Correct term for your booty crack? I seriously doubt that in a medical setting you will hear that Patient So and so has a rash on their booty crack. So what is it?

Gluteal Cleft?

Anal Fissure?

Posterior Cleavage?

Just something to wonder about on this fine Sunday afternoon.