"I Do" is gone....

J's typical answer when asked if she wanted something was always "I do."
"J, would you like a sandwich?"
"I do."

"J, do you want to go to the park?"
"I do."

Well, this weekend it suddenly changed to "Yes."   Still very definitive and strong affirmation, but a boring old yes.

"J, do you want to take a walk?"
"Yes."

"J, did you brush your teeth?"
"Yes."