Sharp edges and corners affect you!
Sharp, protruding angles and corners are dangerous and unsafe. They produce 'cutting chi' or an arrow-like energy that can make you feel irritable and uncomfortable. If your furniture has sharp corners, drape fabric or a vine over the corners to soften' them – just like you did when you 'baby-proofed' your home. What little kids hurt themselves on is the same for adults.
I was at a client's house where they all had bruises caused from a glass-top coffee table. Once we replaced that with a friendlier table with rounded corners, they stopped hurting themselves and were less irritable.