those bottom ones honestly used up so much of my drawing energy that I felt tired before I even started to DRAW draw X''D
I really love how the left on came out tho
I learned a lot on this warm up. I was saying that the shadows on the mastoid muscle on the next made me aware of the placement

The red line is the one im used to adding in to drawings but i would rarely add the blue butit seems to often be visible on men so, learning XD