Prehaps another way to improve the shape of your nech might be tightening the muscles below your chin. theses muscles are hard to get hold of from the beginning but you can soon get the hang of it. its hard to describe in text but its like tensing the muscles between where your chin and face meet. in other words, try tensing the muscles below your face

This briges the gap slightly between your head and your neck and gives a more masculine darker 'shadow' under your face especially when your wearing shirts.

a picture of this will be sent if you mail me