He took the mint chip bowl somewhat skeptically, since he wasn't normally supposed to eat cookie dough- but Wally was giving his approval so Bart wasn't about to turn back now, though he did manage to eat it at a much more sedate pace.
He sat pretty quiet (which was exceptionally quiet by Bart standards), alternating between eating the cookie dough and looking at Wally and nodding a little. Gut was pretty much the thing that Bart ran off of most of the time but he was trying (he really was!) to temper that with brains because... well because he was dangerous according to Batman and not in the awesome scary ninja kind of way. He was the kind of person that this law was invented for in the first place...
But Wally didn't want him to register. And Bart forced a smile though his unusual, amber-colored eyes were still as big as saucers. He didn't want to register either, and it was kind of nice to know Wally was looking out for him- but not registering was going to make him a criminal, a law-breaker. Grandpa Barry never would have done that, seeing how he was a police officer and maybe the greatest person to ever live; right?
If Barry wouldn't have done it... what did that say about Bart? Maybe he didn't take after Barry at all, but rather after someone else...
For a mere fraction of a second, a cringe crossed Bart's face, and even after it was gone, he pushed the cookie dough away. Somehow he'd lost his appetite.
"Hey, Wally?..." He asked, despite already having his cousin's attention, "I mean, just hypothetically, but... what would you do if there was someone you knew, and they were pretty cool and all but maybe... maybe say some of their family wasn't super great? Like-- maybe way ages before they were born like... part of their family was in a feud with your family. And this person is totally okay and not all feud-y and really really likes your family. But yeah there was still that... you know... bad blood in them. Are you supposed to-- I mean, would you still... like that person?" Bart stumbled over his words, mostly hiding his face under his mop of hair.