Back (apologies for my handwriting!)
The text of the postcard is
This is the famous scene where Joe finally found out about birth control.
Joe, crushed, said with exasperation, “but it’s the only thing I’m good at! … well that and pulling off this red sash.”
P.S. I guess I should explain when I first saw this painting I pretended red sash guy was saying “look what I made!” and gesturing to the room.