Maybe if I was going to live with them on an ongoing basis it would seem like a positive step. Being able to be with them throughout the daily and weekly routine might not make specific "couples time" seem like such a big deal. Time together would just happen as a part of the routine of making meals together, sleeping together on some nights, going to choir with them, etc.
To think that I can remember the time when I first heard about poly from him that the idea of us all living together was a big "NO WAY" on my part.
(Although that's what they said they eventually hoped for with the right combination of people and housing situation.)