"The Blind Date" joke

Allen took his blind date to the carnival. ‘What would you like to do first, Sandra? ’ asked Allen.
‘I want to get weighed, ’ said Sandra.
They ambled over to the weight guesser. He guessed 120 pounds. She got on the scale; it read 117 and she won a prize.
Next, the couple went on the Ferris Wheel.
When the ride was over, Allen again asked Sandra what she would like to do.
‘I want to get weighed, ’ she said.
Back to the weight guesser they went.
Since they had been there before, he guessed her correct weight, and Allen lost his dollar.
The couple walked around the carnival and again he asked where to next.
‘I want to get weighed, ’ she responded.
By this time, Allen figured she was really weird and took her home early, dropping her off with a handshake.
Her roommate, Laura, asked her about the blind date, ‘How did it go? ’
Sandra responded, ‘Oh, Waura, it was wousy. ’