Why can't men replace a trash bag?

You know me, i don't get men and the stupid things they do. Rather, the stupid things they don't do.
When a woman takes out a bag of trash, she immediately replaces the bag in the can. Not a man, nope they put the lid back on, no bag. Then they get themselves some fruit cocktail and throw the lid in the trash, somehow STILL not noticing there is no bag in there. THEN their wife, goes to through away a yogurt container, and tosses it in and of course IMMEDIATELY knows there is no bag. Now said wife is wiping yogurt splash off the can and putting in a bag. ARGH!!!!!