I once ditched a man that had a history of being with 8 live-in gfs. I can understand maybe 2 but 8? A serial cohabitator is someone that lives with a partner, breaks up, lives with another partner and continues doing that nonstoppable.
This sounds like someone that's not serious, keeps making the same mistake and hasn't learn about how a lasting relationship is like? Serial cohabitating sounds like casual relationships to me with the only difference of the being ''boyfriend and girlfriend'' by name but not really.