Would...

Would it be possible, to put your entire face in your anus?

A rather painful statement I guess, but considering the fact we're vertebrates, our spine would not allow this kind of rotation of the human body.

But if we wouldn't have this problem, would it be possible?

Yours sincerly!

Go give your mom a spongebath.

In some circles I would be considered insane, Fortunately, this is a triangle

That's astonishing, I've never seen that before!