A joke for Valentine's day

An extremely shy fellow once brought his date a bouquet of flowers.
She threw her arms around him and kissed him long and hard.
After the kiss, he turned and bolted for the door.
She exclaimed,
"Oh! I'm sorry, I didn't mean to offend you."
"You didn't!" he replied.
"I'm just going to run down to the cemetery and steal some more flowers!"