what do donna and harvey do with the can opener

Harvey and Donna's can opener ritual is a running gag in the TV show Suits. The origin of the ritual was revealed in season 3, episode 6, where Harvey randomly suggests using a can opener as a new ritual after their previous whipped cream ritual. The can opener ritual, which also involves thumbtacks, is used to establish a strong bond and partnership between Harvey and Donna. However, the show's creators intentionally never explained what exactly Harvey and Donna do with the can opener and thumbtacks, believing that the mystery added to the show's appeal and allowed viewers to come up with their own interpretations