"First Night" joke

On their first night to be together, the newly wed couple go to
change. The new bride comes out of the bathroom, all
showered and wearing her beautiful robe. The proud husband
says, "my dear, we are married now, you can open your robe."
The beautiful young woman opens her robe, and he is
astonished. "Oh, oh, aaaahhh," he exclaims, "My God you are
so beautiful, let me take your picture."
Puzzled she asks, "MY picture?"
He answers, "yes my dear, so I can carry your beauty next to
my heart forever".
She smiles and he takes her picture, and then he heads into
the bathroom to shower.
He comes out wearing his robe and the new wife asks, "why do
you wear a robe? We are married now." at that the man opens
his robe and she exclaims, "oh, OH, OH MY, let me get a
picture".
He beams and asks, "why?"
She answers, "SO I CAN GET IT ENLARGED"!