Hidden Sex-Joke

About
It appears a lewd joke was placed in Chapter 57 of the Attack on Titan Manga. In a paper which the character Armin Arlert is reading, you flip over the manga and the Japanese text is revealed. It is a sexual parody version of the song "Gu Choki Pa" or Rock, Scissors, Paper, which is song to "Are you Sleeping?"

Roughly translated, the sexual joke in English is: ''Rock, Scissor, paper, Rock, scissor, paper, What shall we make? What shall we make? Dick in your right hand Pussy in your left hand Sex, Sex'' Write the first section of your page here.

Apologies
Soon enough, after the sex joke was leaked, Hajime Isayama, the creator of Shingeki no Kyojin, apologized about it on his blog. He didn't know that the writing was in his own manga.

The Manga Editor in charge of Shingeki no Kyojin explained on Twitter that an assistant supposedly added the joke without Isayama or the editor knowing. The joke was slipped in.

"I take fully responsibility" Isayama wrote. "The cause was the lack of my own awareness of my own manga. As a result, I let down the people who were looking forward to this installment, and I think this is inexcusable. I apologize for this, and from here on out, I will be more aware of my own manga so this doesn't happen again and will concentrate on creating better work."