I don't know if anyone can give a definitive answer, but various hypotheses and experiences were brought up in a discussion of monogamy and polyamory at Less Wr

I don't know if anyone can give a definitive answer, but various hypotheses and experiences were brought up in a discussion of monogamy and polyamory at Less Wrong here: http://lesswrong.com/lw/2ee/unknown_knowns_why_did_you_choose_to_be_monogamous/ http://lesswrong.com/lw/2ee/unknown_knowns_why_did_you_choos...