True, I had a thing for a while with a man who was in an open relationship. Come to find out a year in his wife knew nothing about me at all even though we talked every single day. He didn't want to do the hard work of truly being ethical in his non-monogamy even though they were ostensibly consensually non-monogamous. Plus, I think he liked the thrill of having a secret from her. I dropped him like a hot potato.