My DH wears "Dailies" contacts, which means he wears one pair per day, and then throws them out (was prone to eye infections a few years back, so his doctor recommended these), anyway, he can't see a thing without them, so he takes them out RIGHT before bed, which means there is a small pile of little shiny, dried up contacts on the nightstand every morning

Sometimes they will fall on the floor, and get stuck to my feet-YUCK!
He also has male-refrigerator-blindness as someone else mentioned.
And, he has a habit with cups, though different from others: I get out a cup/glass, and pour water in it, and take a few sips. I put it down somewhere for a few minutes, with the intent of coming back to it-but when I do, it's GONE...I later find it, and he's picked it up and claimed it as HIS glass, drinking the rest of my beverage, and possibly refilled it with something else! I must go through at least 3 glasses each day this way, but I guess it saves on dishes!