Think about it. They are twice what we are in some cases. That guy from mortal kombat with four arms was a conjoined twin, and he always kicked my ass. What couldn't you do with an extra pair of opposable thumbs? Or feet? or ears? Or two brains fused into one spinal chord? Just imagine, or ask Min0 and MinA. I've attached his and his/his and hers/hers and his/hers and hers/their picture...