Robert , 85,  married Jenny,
    a lovely 25 year old . . ..

Since her new husband is so old,
    Jenny decides that after their wed- 
    ding she and Robert should have 
    separate bedrooms, because she
    is concerned that her new but aged
    husband may over-exert himself  if
    they spend the entire night together.   

After the wedding festivities Jenny
    prepares herself for bed and   
    the expected knock on the door. 
    Sure enough the knock comes,   
    the door opens  and there is Robert,
    her 85 year old groom,  ready
    for action. They unite as one.   All
    goes well,  Robert  takes  leave of
    his bride, and she prepares to go
    to sleep. 

After a few minutes, Jenny hears
    another knock on her bedroom   
    door, and it's Robert,  Again he is
    ready for more 'action'. Somewhat
    surprised, Jenny consents for more
    coupling. When the newly weds are
    done, Robert kisses his bride, bids
    her a fond good night and leaves. 

She is set to go to sleep again, but,
    aha, you guessed it Robert is  back
     again, rapping on the door and is as
    fresh as a 25 - year - old,  ready for
    more  'action'. And, once more they
    enjoy each other. 

But as Robert gets set to leave again,
    his young bride says to him, 'I am   
    thoroughly impressed that at your   
    age you can perform so well and so
    often.  I have been with guys less     
    than a third of your age who were   
    only good once. You are truly a great
    lover, Robert.' 

Robert, somewhat embarrassed, turns
    to Jenny and says:
    'You mean I was here already?'   

The  moral  of  the  story: 

Don't be afraid of getting old,   
     Alzheimer's has its advantages.