'You got to keep the old motor running.'

The marriage of an 80 year old man and a 20 year old woman was the talk of
the town.

After being married a year, the couple went to the hospital for the birth
of their first child.

The attending nurse came out of the delivery room to congratulate the old
gentleman and said, 'This is amazing. How do you do it at your age?' The
old man grinned and said, 'You got to keep the old motor running.'

The following year, the couple returned to the hospital for the birth of
their second child. The same nurse was attending the delivery and again
went out to congratulate the old gentleman. She said, 'Sir, you are
something else.
How do you manage it?' The old man grinned and said, 'You gotta keep the
old motor running.'

A year later, the couple returned to the hospital for the birth of their
third child.
The same nurse was there for this birth also and, after the delivery, she
once again approached the old gentleman, smiled, and said, 'Well, you
surely are something else! How do you do it?'
The old man replied, 'It's like I've told you before, you gotta keep the
old motor running.'

The nurse, still smiling, patted him on the back and said, 'Well, I guess
it?s time to change the oil. This one's black..'