Old but good [thread creep]
A woman was helping her husband set up his computer and, at the appropriate point in the process, she told him that he would now need to enter a password. Something he could remember easily and would use each time he had to log on.
The husband was a bit bored by the process and, feeling in a rather amorous mood, figured he would try for the shock effect to bring this to his wife's attention. So, when the computer asked him to enter his password, he paused for effect, then letter by letter, with his wife watching over his shoulder, he keyed in ......
P
E
N
I
S
His wife fell off her chair laughing when the computer replied:
PASSWORD REJECTED.... ... NOT LONG ENOUGH