Woman's Answer:
One! ONLY ONE!!!! And do you know WHY?
Because no one else in this house knows HOW to change a light bulb! They don't even know that the bulb is BURNED OUT!!
They would sit in the dark for THREE DAYS before they figured it out. And, once they figured it out, they wouldn't be able to find the #&%!* light bulbs despite the fact that they've been in the SAME CABINET for the past 17 YEARS!
But if they did, by some miracle, actually find them, 2 DAYS LATER, the chair they dragged to stand on to change the STUPID light bulb would STILL BE IN THE SAME SPOT!!!!! AND UNDERNEATH IT WOULD BE THE WRAPPER THE FREAKING LIGHT BULBS CAME IN!!! BECAUSE NO ONE EVER PICKS UP OR CARRIES OUT THE GARBAGE!!!!
IT'S A WONDER WE HAVEN'T ALL SUFFOCATED FROM THE PILES OF GARBAGE THAT ARE A FOOT DEEP THROUGHOUT THE ENTIRE HOUSE!! IT WOULD TAKE AN ARMY TO CLEAN THIS PLACE!

AND DON'T EVEN GET ME STARTED ON WHO CHANGES THE TOILET PAPER ROLL !!
I'm sorry. What was the question?