Men - bin?

Another one of these mysteries with men. How come men can step over the bin bag on the way out the door, and just leave it there? When the bin is full I close the bag, place it in front of the door, so the next person leaving will take it with them to the container outside the house.

Why is this difficult to understand? I have yet to meet a woman who would just leave it there for the next person. Do men think the bin bag is there for decoration? Or that it will walk itself out?

Here in Zürich we have special bin bags, so there is no chance of mistaking it for something else than trash.

Anyone?