My understanding of the jealousy aspect is that men worry about it from the primary partner more than it actually shows up. I think it’s that subconscious belief that this is some other guys' woman and that even if he says he’s cool with it, how could he really be because she belongs to him. Although this also goes the other way. My experience with FMF is that the other woman spends the first 30 minutes or more determining if I’m really OK with this or not. Tamara didn’t. It’s one of the many things that I adore about her.