Tight skirt

This lady that was wearing a tight skirt was waiting at the bus stop to get
onto the bus. A bus pulled up and the driver opened the doors. She tried to step
up onto the step but her skirt was too tight. So she reached back to unzip and
loosen it a little. She tried to step up onto the steps again. But it was still
too tight. She reached back and unzipped some more. Tried to step up again and
the skirt was still too tight. She tried one more time. She reached back and
unzipped some more. And she still couldn�t get up onto the bus. So this man
behind her reaches and grabs her by the butt. He gives her a boost onto the bus.
She turns around and slaps him and saying "What do you think you are doing."
Well the man says "Well lady after you unzipped my pants for the third time I
thought we were acquainted."