Because they can't even
What's 72? 69 with 3 people watching!
One's a prime number, the other's a prime minister.
A Lift (only a joke, my American friends)
Alcoholics synonymous.
A bowling ball. Or Bruce Wayne's parents.
Because one nun follows the other nun to make sure that nun doesn't get none.
They can't even
1. She's basic. 2. She literally can't even.