An approach to sex and human sexuality that embraces the full benefits of sexual interraction as healthy and uplifting, based upon the premise that sexual expression is good and healthy and that societal repression or control of the individual's sex-drive is bad and unhealthy.
Sex Positive people advocate comprehensive sex education, because even in a free-sex utopia one must still be wary of sexually-transmitted diseases and unwanted pregnancies.
A person so enthralled with polyamory they forget about monogamy and monogamy-oriented thinking altogether.
John called me and said "Great news, we are pregnant!" and I am so polycentric my first words were, "Congratulations! Who is the mother?" Then I remembered he is in a monogamous relationship, so I guess his wife had better be the mother!