At my house we have 2 couples. Me and my H are both in relationships with other people. My biggest issue is time spent with my H. H on the other hand does not like the fact that I love someone else too. He understands and tries not to have a double standard but it is still hard on him. When we just had an open relationship and it was just sex he was kind of ok with it. Mainly, I think, because I rarely did anything with someone else. Love on the other hand is harder on him. He has the fears of me leaving him, which will not happen, he is stuck with me
but it is still a fear.
I really just think it is a person to person difference. Every person is different in how they look at life and the problems they face. However in my case it is definitely the man who has possession issues.