Me and T have been sitting on the floor from very early on. I have always found sitting in chairs uncomfortable (I have a soft tissue disorder). We were talking about how we could make things more comfortable and I mentioned this. T asked if I would like it if we sat on the floor, the rest as they say is history.
To begin with T sat on one of the cushions from one of the chairs, but after discussing a dream that it came up in he has since just sat next to me without.