These sketches vary in time lengths, but are all the same guy.
The same goes for these different sketches, they vary in time lengths, but the top two are the same people and the one on the bottom is a different person and more done in a vector or boxy to figure out the angles in the body.
I had very few female models come to drawing class, but I loved the shape of her body, it was different than what I am used to drawing.
BONUS: Leg studies. I love drawing legs and feet.