They were both two shellfish
Because they like to play with each other's oui oui.
He likes to go... bearfoot!
You're two shellfish.
Santa Claws
Finding crabs on your organ.
Pubic transportation
Because he was Snowd en! (according to my friends this joke has been around for awhile, but I hadn't seen it yet, and wanted to share the goof)
He was a little shellfish.
Shellfish.
Because he's shellfish!