A blonde goes over to visit one of her friends.
While she is at her friend's house it starts to rain very heavily. Her friend tells her to spend the night at her house and go home the next day.
When she hears this, the blonde rushes out the door and comes back a while later totally drenched and carrying a small shopping bag.
So her friend asks "Where did you run off too?"
"I went home to get my pajamas!"