Every house has at least one. The electrician puts them in just for kicks!
I read this and then said that’s bs. Lol I’m not an electrician but wired my house. By the time I got to the bottom..... it clicked. I installed a 3 way at the top and bottom of my stairs because stair lighting is code. But my stairs are sufficiently lit so the switches do nothing lol well they control a plug that’s underneath the stairs but only I know.
