Okay, so this picture is...interesting and not in a bad way, it's actually really good. But I don't understand what this is so I'll just have to see what I can do for you...
So I think that you need to make these a little more realistic...the necks seem extremely long for something normal and so do the arms. The hands need to be more detailed and easy to be seen, as in understand what that is? The position? Etc. The upper bodies seem really a like and if thy are gonna be different there needs to be a big difference between breast and muscle. (Sorry to be so out there, but you need to know this :] ) The guys', and I'm guessing the person in the left is the guy, mouth look weird and needs to be more...self explanatory...? I don't know if he is smiling or what?!
Anyway, that's all I have to say, but other than that I liked this drawing and was interesting to look at. Good job.