the other arm has a black diamond on top
i cant do hands very well sry :S i can try to cover it up XD
to the chest ok ill ad the demon no problem
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Nice job on the torso, the black on the hand should be a little thinner.

The groin seems a bit plain atm though also the forearms

the triceps i dont see anything more to add, they are small so low details stand better
the black line fits with the fingers but ill try to cut some space in there XP
as about the groind i dont know do you wand a dick there? XP i never do work on there

Hahaha for the groin maybe following the torso design but with a "V"?

Yeah that's good. I have an idea for the top of the hands, you can copy the shin style and give the top of the hands a diamond cut out kinda thing?

And for the forearms, maybe add diamond blue shapes sticking out of the blue already there, just to make the texture look more presentable.

what to do with the right tricep?

Hmm maybe similiar to the left arm, but using that curved shape?

Yeah that's good too.