Two: One to change it, and the other one to change it back again.
Changed its status from 'In A Relationship' to 'Single'.
They're afraid of change.
Two. One to assure that everything possible is being done about the situation and the other one to screw it into the faucet.
None, no light bulb dare go out in the presence of Chuck Norris.
They both enjoy handshakes.
About 1 in every 600 million has a chance of becoming a human.