Kennedy was a BIT hesitant about changing into THAT. It was worse that his grandmother's pajamas. After changing into the very ANCIENT swimming attire he gathered around Professor Scabior. Did he have any idea how silly Kennedy felt in the swim suit. Salazar Slytherin probably wore the same one when he swam.

Pssh.

His attention was drawn away when Gillyweed was mentioned. He's read about that, but has never had the honor to ingest it. Cool.