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The Clone Question

(Based on those car commercials.)

{Two people are driving down a mountain road in their brand new car.}

Announcer:  Our new vehicles are produced with extra headroom, four-wheel power-   

                       steering.  Since we've thought of everything, what will you think about?

Driver:  I was just wondering. 

Passenger: Yeah?  What about?

Driver:  If someone was to clone you, and at some point, you had sex with yourself, 

              would that be considered incest or masturbation?

{Both sit in silence for a few seconds while the passenger looks at the driver.}

Passenger:  I don't know, but who would be willing to clone me?

{Driver shrugs, and they continue driving in silence.}

Announcer:  With all that extra space in your head, what will you think about?