A woman walking down the sidewalk passes a storefront window full of clocks and goes inside the shop. Id like to buy a clock, please, she tells the old gentleman inside. Im sorry, but I dont sell clocks, he answers. But I really need a new clock, the lady persisted. Im sorry, but I dont sell clocks, he repeated. But the clock I want is right there in your window! Lady, for the last time I dont sell clocks! Im a mohel. So why do you have clocks in the window? The old man shrugged and asked So what should I have in the window??