"Leonard Hofstadter: My point is, if you want to learn how to make friends, go to a coffee shop or a museum, meet people, talk to them and take an interest in their lives.
Sheldon Cooper: That's insane on the face of it."
"Leonard Hofstadter: I'm just saying that you can't approach this intellectually.
Sheldon Cooper: However do you mean?
LH: Remember when you tried to learn how to swim from the internet?
SC: I did learn how to swim.
LH: Yeah, on the floor.
SC: The skills are transferable. I just have no desire to get in the water.
LH: Then why learn how to swim?
SC: The ice caps are melting, Leonard. In the future, swimming won't be optional. "