Wife's Birthday cake

A man wanted to celebrate his wife's Birthday by throwing a party.
So he ordered a birthday cake. The salesman asked him what message he wanted put on the cake. He thought for a moment and said,
'Put "Getting older but you are getting better" '.
The salesman asked "How do you want me to put it?"
The man said 'Well...put "You are getting older" at the top
and "But you are getting better" at the bottom.'
When the cake was unveiled at the party all the guests were aghast at the message on the cake. It read "You are getting older at the top, but you are getting better at the bottom"