Does disproving your entire argument take you down?
Because I can do that.
Your main point so far has been that polyamory is illegal and is "cheating." Cheating, by definition, means that it is without your partners consent. By this logic, an open relationship is cheating. Furthermore, you've claimed that it's illegal in most states, which is entirely false. A quick google search says that non-marital relationships with multiple people is completely law abiding. You have polyamory confused with polygamy. Get your facts straight. Learn to debate properly. Grow up.