lactose intolerant

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 on it. It is entitled "Not Milk