Melissa Nesbitt from Texarkana Museums System in Arkansas writes, “I just heard this from a visitor to our museum today–he can’t (of course) remember at what historic home he heard it, but it went something like this–there were often double doors on older homes (one on each side of the front area I think he meant), and one was used for entering and one for exiting because it was “bad luck” to enter and exit through the same door. Yeah, right… ”
Actually, Melissa, your visitor has it backwards. The superstition says it is bad luck for entering and exiting through different doors. So if you entered through the back door, you should exit through the back door to avoid bad luck. Some attribute this to Irish superstition; others to general folklore.
I can’t quite see what the visitor here had in mind . . . “double doors” are just a single opening with two doors that open from the middle. If he meant “two front doors” in one house, he’s probably picturing a duplex.