Forever- it ought to be different

Once upon a time there was a little girl who was covered from head to foot in sharp knives. This made things in general a bit difficult for her but it was usually no problem. One day she met a small boy. He saw her and called out, "Would it be ok if I play with you and will you be my friend?"
"Of course it would be ok. I will be your friend and you can be mine," she replied.
So they played together for a while. Eventually the boy got too close to her and was hurt by the knives. He sat on the ground and began to cry. The girl came over and tried to console him but he complained loudly to her, "You're going to hurt me again! What's wrong with you?"
The little girl was puzzled and asked him, "Didn't you see the sharp knives?"
"Of course I did. I knew they were there. I'm not stupid."
"If you knew they were there, then why did you still choose to play with me?"
The boy protested, "You said it would be ok."
"It is ok," she said. "I have no problem with it, it's the way I am. I supposed you would have known that playing with me you might get hurt."
The boy stared at her a minute then, seeing she was serious, got up and ran away quickly. The girl shrugged her shoulders and began to play alone. Being unable to remove the knives, she remained this way and was sadly content the rest of her life.