Several years back I worked with a woman who was a little overweight, but had a wonderful sense of humor on the issue (and all other things). She would tell all the children that she was a princess which I always assumed was at least a little tongue-in-cheek due to her weight. She would wear a little tiara in the classroom, and regularly remind the children she was a princess. The kids all loved the bit.
One day a little kindergartner approached her and asked, "Miss Cousins, why do you call yourself a princess?"
"Because I'm the most beautiful teacher in the school." said Miss Cousins confidently.
The little one paused with amazement. "Wooow! And you have two chins!"
They say the darndest things. :)