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Q&A Why would two humanoid species be physically unable to touch each other?

I need a reason for two antagonistic humanoid lifeforms living on the same planet to be completely incapable of direct physical contact. I don't mean they have a strong aversion to it, I mean the...

21 answers  ·  posted 7y ago by OptimalSolver‭  ·  last activity 7y ago by OptimalSolver‭

Question aliens