Two, one to screw it in, and another to repent.
or
Bike helmets don't fit hippos
or
None, because they were copycats
or
In a snow bank!
or
One is really heavy, the other is a little lighter.
or
Orange Is The New Black.
or
None. The darkness will cause the bulb to change by itself.
or
On the bottom of the chicken's foot!
or
To get to the body shop.
or