>For example USCIS apparently puts some people through interviews where they ask for intimate personal details of the spouse, like what side of the bed they sle

>For example USCIS apparently puts some people through interviews where they ask for intimate personal details of the spouse, like what side of the bed they sleep on or the color of the toothbrush they use. This implies a particular definition of marriage — one where you sleep on the same bed and use the same bathroom. They aren’t looking for a “particular definition of marriage.” They are looking for inconsistencies and divergences between what each partner says, thus trying to catch them lying. I heavily doubt they will call your marriage fraudulent just because you and your partner don’t share the same bed.