The IRS agent goes through the audit normally, and finds nothing wrong with the synagogue's taxes. Eager to find something amiss, he looks around and sees the candles burning. "Rabbi Rabinowitz," he begins, "what do you do with the drippings from the candles you burn?"
The Rabbi quickly replies, "Well, we gather them up and send them back to the candle makers, and once a year they send us a complete box of candles."
Slightly annoyed at this answer, the tax man makes another attempt to catch the Rabbi on something. He asks, "What do you do with the crumbs and leftovers of the cracker things you eat?" He is pleased with himself as the Rabbi takes a moment to think it over.
After a moment, the Rabbi replies, "Well, we gather them up, send them to the cracker company, and once a year they send us a complete box of crackers." At this point, the IRS agent is furious, and the Rabbi knows what's going on. In a last ditch effort, the agent asks, "Okay, and what about the leftover foreskins from your circumcisions? What do you do with those?" Without missing a beat, the Rabbi replies, "Well, we gather them up, and send them to the IRS. Once a year, they send us a complete dick."