Description
Oh wow I drew something.
In Sketchbook, there's a symmetry tool that lets you make perfectly symmetrical drawings (as I'm sure you guessed).
So, me being me, the first place I go with it is diprosopus.
(This is a real thing, but be careful if you decide to google it. Cats and other animals are sometimes born with this, and they'll be photos of them, and I know that freaks some people out.)