A man got on an elevator in a tall building.
When he entered the elevator, there was a blonde already inside and she
greeted him by saying, "T-G-I-F".
He smiled at her and replied, "S-H-I-T."
She looked at him, puzzled, and said, "T-G-I-F" again.
He acknowledged her remark again by answering, "S-H-I-T."
The blonde was trying to be friendly, so she smiled her biggest smile and
said as sweetly as possibly, "T-G-I-F" another time.
The man smiled back to her and once again answers "S-H-I-T."
The blonde finally decided to explain things, and this time she said,
"T-G-I-F. It means "Thank Goodness It's Friday". Get it, duuhhh?"
The man answered, "S-H-I-T -- "Sorry, Honey, It's Thursday". duuhh!!