Jack and Betty are celebrating their 50th wedding anniversary, when Jack asks his wife, ''Betty, have you ever cheated on me?''

Betty replies, ''Oh Jack, why would you ask such a question now? You don't want to ask that question.''

''Yes, Betty, I really want to know. Please.''

''Well, all right. Yes, three times'¦''

''Three?!? Well, when were they?'' he asked.

''Well, Jack, remember when you were 35 years-old and you really wanted to start a business on your own, and no bank would give you a loan? But, then one day the bank president himself came over to the house and signed the loan papers, no questions asked?''

''Oh, Betty, you did that for me? I guess I can't be too upset about that. Well, when was number 2?''

''Well, Jack, remember when you had that last heart attack and needed that very risky operation that no surgeon was willing to perform? And, remember how Dr. DeBakey came all the way up here, to perform the surgery himself?''

''Betty, you should do such a thing for me, to save my life. To do such a thing, you must truly love me darling. How can I be upset with that?''

''So, all right then, when was number 3?''

''Well, Jack, remember a few years ago, when you really wanted to be president of the golf club and you were 17 votes short?''