rule 34 2boys 2d 2d gorillaz anal anal penetration anal sex artist name black hair blue hair collarbone cross necklace dark nipples duo erect nipples erection gay gorillaz green skin hand behind head hickeys legs held open light skin male malemale male only missionary position mouth open multiple boys murdoc niccals necklace pull nude penis penis size difference pointed ears receiving on back scariestgargoyle sex spread legs tattoo upside down cross yaoi 4535292