>>103636103>>103636148Because he caved to peer pressure and told him what his present was.
A sucker is someone that gets scammed. Reginald scammed him into revealing something Reginald wanted to know but Beartato did not want to reveal.
Unbeknownst to Reginald, but known to us, Beartato isn't actually a sucker. It's Reginald who is being tricked into doing the shopping for his own present.
This disrepency between the knowledge of the character and of the reader is called 'dramatic irony', the central crux of many a joke, both in Nedroid and other comedic works.
