Besides the logical reasons like being able to file jointly on taxes and other scenarios where having a legal spouse is necessary, we love each other and the open part of our relationship is just a fun, occasional thing that works for us. But there’s a time and place, like right now we’re in the process of moving and just got engaged so we’re focusing on us only right now. I wouldn’t necessarily call our other flings “love”. We tried being poly but actually dating new people is exhausting