So let's see. an inexperienced salesgirl makes an incorrect assumption that a man was looking for someone (perhaps his wife?) rather than looking to buy something in a woman's clothing store. Your response is to be sarcastic. She apologizes and asks to help you find what you want. Your response is to be insulting and then walk away.

I am very happy that you weren't dressed. I'd hate to have been the next CDer that went into the store if you had been!