This isn't too much but looking at the plane breakdowns done here in this model, you can see that the artist has an eye for proper anatomy and he is prepared to build off the planes he's placed into the model.
How to Draw a Face - 25 Step by Step Drawings and Video Tutorials
Good anatomy references for drawing - head/neck
Male face and hair reference
See this Instagram photo by @xafeelgood • 5,527 likes < photo of male face drawing expressions and angles and one gay couple
not really a tutorial, but y'know just sharing what i've learned so far about making pretty men faces i sketch and do lines in FireAlpaca because it has. sketchin a pretty dude's face walkthrough thing