I agree with what Cris said.

I think this comic would be almost just as funny without the kid crying and yelling at the end. The funniest part to me is the implication that this guy decided his children’s names as babies just for a laugh when introducing them; he probably loves every opportunity to do so, and always makes sure to introduce ketchup first.

(Just to be clear, in case these condiments aren’t popular where you’re from- ketchup is red and mustard is yellow, and they’re often used together, so people see the yellow brother of ‘ketchup’ and think he’ll be named ‘mustard’, but then they find out he’s named ‘piss’ instead)