message on the cake

A man wanted to celebrate his wife's Birthday by throwing a party. He ordered a birthday cake.
The saleswoman asked him what message he wanted put on the cake. He thought for a moment and said:
Put: "You are getting older but you are getting better."
"How do you want me to put it". The saleswoman asked.
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."