I NEVER HAVE MADE TUTORIALS LIKE THIS WITH EXPLANATION. SO I HOPE YOU DO LIKE IT... IF NOT THAT'S OK...
So... I felt bored, and thought a mane tutorial would be nice and simple to make. It's not 100% accurate, but this is how I draw it, and it's the best way to redline first a sketch.
I hope you enjoy <3
(Software seen in this tutorial is called Adobe Photoshop CS2)