Andy gets on the phone to one of his old professors, asking for tips on de-incentivizing. "I guess you could say I'm in one of those classic ass-tattoo incentive situations." By the time he's off the phone and looking out his window, Erin's finishing filling in the ass-mometer. "Took 'em one day," Andy says disgustedly.
So then the employees are going through the final designs to have applied to Andy's ass which include a vomiting clown with the caption, "I'm not as think as you drunk I am," and a "Do Not Resuscitate" stamp. Andy interrupts to offer his car for a thousand points or best offer, but when nobody's interested (it's a Prius with a big scratch on it, after all), Pam flips to the next concept, an idea from Phyllis that's too nasty to show. Of course it's from Phyllis.
Cut to the whole office walking into the tattoo parlor. Pam shows the artist the concept drawing, which we still don't see, but the artist wants to clarify, "So coming out of his butt is a..." "Baby," Pam confirms. Andy is still looking for a way out, and when he miserably heads outside, saying he just needs a second, you can see the exact moment when it stops being fun for Jim.
He heads out to join Andy, and tells him nobody expects him to go through with it. Well, maybe some of them don't, but I'm guessing 88 percent of them do. Andy admits to Jim that he has no idea why Robert picked him, or even what he's doing. Jim asks if Andy likes the job, and points out that everyone else is having fun. "You did that." Which is very generous coming from Jim, who's actually the one who did it. Andy protests, "My ass is only so big. I can't do this every day." Well, like Jesus said, turn the other cheek. Jim says it'll buy Andy time until his next great idea, "Which, by the way, I can't wait for." So he can hijack it to humiliate Andy, which he doesn't say. Andy confirms that nobody expects him to actually do it, and heads back inside, saying, "Let's ink my stink!" He THs, "My heart belongs to music, but my ass belongs to these people." He drops trou in front of everyone and dives onto the table, even though the artist would rather he just lower the pants a bit. "Sweating pretty heavily," Andy demurs. Pam hands the artist a new drawing to work from, with "a few adjustments." There's the de rigueur bit where Andy flinches at the cotton swab, and soon the needle is at work.