Interesting you say that. When I grew up I was always told that four legged furniture was more stable than three legged ones. Three legged stools/tables were co

Interesting you say that. When I grew up I was always told that four legged furniture was more stable than three legged ones. Three legged stools/tables were common (but not chairs I think) when I grew up and I was always cautioned against toppling. It could be because three legged furniture created a virtual triangle shape (Even if the top of the furniture itself was not a triangle, circular ones were very common) and when one puts weight on the side of the base of the triangle, like siting on the edge, the furniture is more likely to topple than a similar action on a four legged stool.