This isn't me in the pic but you know where the mustache ends and pretty much where the beard is, there's like a line on both sides of my face there that doesn't grow.
Do any other guys have facial hair that doesn't grow in certain areas?
Facial hair patterns are genetic, there are many variations, some guys have none, some have a thin mustache, others a goatee or soul patch, others a full beard, and everywhere inbetween.