I love Heinlein, and I'm pretty sure his books had some influence on me and my own ideas about love and what is possible. I have used Stranger In a Strange Land examples not a few times when trying to explain poly to people. That and my food analogies.
Often he had been often bound with fetters and chains, and the chains had been rent asunder by him, and the fetters broken in pieces: neither could any man tame him...and he asked him, What is thy name? And he answered, saying, My name is Legion: for we are many.