I always felt that with two sets od arms you would need two sets of chest muscles, or you wouldnt really have much strength on the second set. Anatomy is important
you're right.. but I think with an humanoid body 2 sets of arms with 2 sets of chest muscles would put much pressure in the lower back and would make the torso too long. and heavy Unless the gravity of the planet was weaker that earth's gravity. I dunno maybe the small set of arms is just for manual jobs or precision jobs that don't require much strength.
I often get carried away with this kind of things x)
I often get carried away with this kind of things x)