Back Gap

The one and ONLY true form of the sexy back that Justin Timberlake can't even beg to differ.

This specific portion of a muscle is also known as an Erector Spinae.

Nobody misses out on this beautiful crevice, please.

Damn girl, I can't wait to take a body shot off of your back gap. I'll let that streamflow right to my mouth from that valley of yours. MMMMMMMMMMMMMMMMM