So I was listening to this podcast:

The Truth About Living With A Micropenis

It's about living with a micropenis. But they mentioned several things that really confused me.

1. The typical vagina is only 3-5 inches deep.
Webgoji - Oh BULL, that would mean that even I am running into the cervix and that's not true.
2. The typical vagina relaxes and expands in all directions, even back.
Webgoji - Um ... but there's still that issue of the cervix.
3. The cervix will move out of the way to accommodate a penis.
Webgoji - Okay ... whoa, whoa ... whoa. All of that is connected. The cervix can't just go hang out with the ovaries until it's all done.

So my questions are:

1. Does the vaginal canal actually expand backwards and when it does ..?
2. Does the cervix fold itself over or under or something to allow for this expansion?

The physics just aren't adding up in my head. If anyone understands this, please let me know.