I dare not talk about the green men-- it's all politically incorrect nowadays. Even "little" green men will get you in trouble, they prefer 'dimensionally suited' or something like that, so I avoid it.
It is funny too that humans think their bodies are worth reproducing-- can't take the cold, we have internal organs we don't need, senses we can't use anymore, can't jump, can't run fast, fly-- this form doesn't seem very well thought out.