The space between the posterior wall of the vagina and the anterior wall . septum is the main portion between the gap from vagina to rectum.
'Congratulations! You might not have a thigh gap, but that means you've probably got a lovely tight vagina!' And other things not to say to women, ever.
YourTango breaks down how your nether regions react during a dry spell. Sex is good for our body in ways we can't even imagine. From better.