Blonde joke

A business man got on an elevator.
When he entered, there was a blonde already inside who greeted him with a
Bright, ‘T-G-I-F.’
He smiled at her and replied, ‘S-H-I-T.’
She looked puzzled and repeated, ‘T-G-I-F,’ more slowly.
He again answered, ‘S-H-I-T.’
The blonde was trying to keep it friendly, so she smiled her biggest
And said as sweetly as possibly, ‘T-G-I-F.’
The man smiled back to her and once again, ‘S-H-I-T.’
The exasperated blonde finally decided to explain.
‘T-G-I-F’ means ‘Thank Goodness It’s Friday.’ Get it, duuhhh?’
The man answered, '‘S-H-I-T’ means ‘Sorry, Honey, It’s Thursday’