Mmmm, I think our back door has been open too long! Summer and we live in the country, so the back door, which opens onto a large verandah, stays open to let cooler air in. A busy wasp has built a beautiful mud trumpet around a screw. Soon it will be filled with small spiders and insects in suspended animation. I don't know what wasp or how long I will have to leave the door open! And yes, the door is painted with chalk board paint and friends and family do leave messages on it.