The banker saw his old  friend Tom, an eighty-year old rancher, in town. Tom had lost his wife a year  or so before and rumor had it that he was marrying a 'mail order' bride. Being  a good friend, the banker asked Tom if the rumor was true.
Tom assured him that it was. The banker then asked Tom  the age of his new bride to be.

Tom proudly said, 'She'll be twenty-one in November.'  Now the banker, being the wise man that he was, could see that the sexual  appetite of a young woman could not be satisfied by an eighty-year-old man.  Wanting his old friend's remaining years to be happy the banker tactfully  suggested that Tom should consider getting a hired hand to help him out on the  ranch, knowing nature would take its own course. Tom thought this was a good  idea and said he would look for one that afternoon.

About four months later, the banker ran into Tom in  town again. 'How's the new wife?', asked the banker.

Tom proudly said, 'Good - she's  pregnant.'

The banker, happy that his sage advice had worked out,  continued, 'And how's the hired hand?'

Without hesitating, Tom said, 'She's pregnant  too.'