Would like to hear the funniest joke ever. And can you get this? There are 2 rooms, one with 3 light bulbs (that never burn out) mounted on the wall, one with 3 switches (that never wear out). Your goal: to figure out which switch goes to which light bulb. These 2 rooms are separate and once inside one, you cannot not see inside the other. The room with the 3 switches has 1 switch connected to 1 light bulb in the other room. There are no tricks to the wiring, each individual switch goes to exactly 1 light bulb, and vice versa. You are allowed to go into the room with the 3 light bulbs as often and for as long as you like, but you cannot damage anything (to look at the wiring, for instance). Once you do go into the room with the 3 switches, you can flip the switches on and off as often and for as long as you like (again, barring any damaging activity), but as soon as you leave that room, you cannot return. You can then go back to the other room, but then you have to give your answer at that point.