Every person may not get every joke and that’s okay. It’s also okay to ask but for anyone checking the comments first: cats often press their front paws into their person, fully extending each front leg as they spread their toes then repeating. Most people call this “making biscuits.”
Batman is seen with the main cast of Jaws, with his Bat-shark repellent in hand. Jaws came out in 1975, Batman: the Movie in 1966. If you get that joke you might be old, or you have been well versed in the classics.
The Master's Table 
Every person may not get every joke and that’s okay. It’s also okay to ask but for anyone checking the comments first: cats often press their front paws into their person, fully extending each front leg as they spread their toes then repeating. Most people call this “making biscuits.”
Batman is seen with the main cast of Jaws, with his Bat-shark repellent in hand. Jaws came out in 1975, Batman: the Movie in 1966. If you get that joke you might be old, or you have been well versed in the classics.