his arms seema bit thin at the middle imo , and the face seems kinda odd, it doesnt look much human , maybe studying the human skull will help you . sorry if i sound to vague but my head hurts...
I'd change that pose also... unless he's supposed to be gay, in that case, it's fine I agree though, the inner elbow should and the skull shape be adjusted. His eyes could use a little more detail also so they don't stand out so much.