A man walks into a tee shirt store. There are 3 shirts on display:

The first has a picture of Richard Nixon with a white mustache.
Below the picture is titled "Got Milk".

The second tee shirt has a picture of Ronald Reagan with a white mustache.
It is entitled "Forgot Milk".

The third tee shirt has a picture of Monica Lewinsky with a white mustache.
It is entitled "Not Milk".