Contrasting Views

We worked with charcoal last night in art class, and I continued with my ongoing problem with contrast.  I add in contrast - and then I smear it away, tone it down, erase it one way or another, whether with paint or charcoal. It seems a good metaphor, that I should be more bold instead of backing away.

Not a T-Rex
charcoal on paper

And no, by the way, the still life items on display did not include a T-Rex -- that's just how my drawing came out.  I think the skull was from a horse, although I forgot to ask.  

But my, my, what big teeth it has.