Living in a nudist colony?
Too embarrassed to let her know that he lives in a nudist colony, he cuts a photo in half but accidentally sends the bottom half of the photo.
He's really worried when he realizes that he sent the wrong half, but then remembers how bad his grandmother's eyesight is, and hopes she won't notice.
A few weeks later he receives a letter from his grandmother. It says, "Thank you for the picture. Change your hair style.... it makes your nose look too short.