I heard that one before,only between a pastor and wife.
They're out on a business trip,and the husband had to go home early. Wife says, if I don't make it back, look in the closet and open the gray box. He goes home, gets curious, opens the box...there are three eggs and a stack of hundred dollar bills. Wife gets home, confesses, asks about the box. Wife says, well, honey, over the years, whenever you pitched a bad sermon (a la "laid an egg"), I came home and put an egg in the box. Husband says, "wow, 25 years of preaching, and only three bad sermons, cool! But what's with the stack of benjamins? She says, "When you get to a dozen eggs, you gotta sell."
Good one!!!