Again, it depends on the individuals involved. There are no absolutes here. One woman’s meat is another’s poison. I have been in an open relationship where the lady respected my wish “not to know”, while I respected hers to tell when/if she asked. I also think it’s a hell of a lot less complicated to be in an open relationship when you’re not living with a partner you’re in “love” with. You’re far more accountable for your time, and whereabouts in a cohabitation scenario.