I'm not saying they are the same or always the case. I'm just saying that is someone is already going to live with a partner, then it isn't a big deal to share

I'm not saying they are the same or always the case. I'm just saying that is someone is already going to live with a partner, then it isn't a big deal to share a house with another couple. i.e There is pressure for people living in that area or moving into that area to find a SO or something similar.