Each picture is in fact a humorous reference to something similar - or related - to the subject matter.

Other pieces make humorous references to the history of photography.

The Simpsons has made a number of humorous references to the statue.

He threw in that word more out of pique than as a humorous reference.

It was chosen as a humorous reference to the area's reputation for housing numerous Adult film studios.

Many of the earlier uses appear to be humorous references to a fictitious state.

The Prosh newspaper usually contains humorous references to various well known persons of the day.

But such critical comments were intermingled with more humorous references and some praise.

Also, a number of comics unrelated to Wanted have featured similar covers in humorous reference.