Amy's obscene tattoo

Amy showed her obscene tattoo to the rest of the in Historic 20th Century Apartments in 3000 after making a remark about the low-definition TVs of the 20th century. We cannot see it clearly due to our primitive technology, but it appears to consist of two red figures, possibly Decapodians.

Trivia

 * Amy's obscene tattoo exists as a prank on the audience by being deliberately blurred, poking fun at the dominant low-definition TVs on which the episode was likely viewed at the time it aired. However, subsequent years saw the rapid rise of plasma and LCD high-definition TVs, removing some of the humor from the joke for anyone watching on a high-definition TV. Though the argument could be made that the necessary viewing methods won't exist for 1,000 years
 * Amy also has a talking tattoo and a moving tattoo.