Brilliant work on the double-torso! I always struggled to accept characters with 4 (and more) arms because the additional arms are always illustrated jutting out by the ribs or armpits with no shoulders to support them. I feel you can't just staple extra arms onto a body and think they will be functionally useful, but this is the first example I've seen that's actually believable (alien as it it).
Huh. That's an interesting way to draw a green martian -- a torso stacked on top of a torso. It does solve a few problems with arm placement and arranging things so the arms stop getting in each others way.