Big Bang Theory "Shamy's" thoughts on Romantic Love

Was watching a repeat episode of the Big Bang Theory today, and I found Amy's retort about the unnecessary nature of romantic relationships funny. I found it hilarious.  Below is the scene:

Scene: The stairwell. Amy is sitting on the bottom step.
Sheldon (wearing a heavy coat and false nose and glasses): EZ Aquarii B, EZ Aquarii C, excuse me, madam.
Amy: Sheldon?
Sheldon: Rats!
Amy: I believe a misunderstanding may have occurred when I asked you to meet my mother.
Sheldon: No misunderstanding. I’ve learned what that request actually means, and I don’t want to be joined to another object by an inclined plane wrapped helically around an axis.
Amy: In what way are you screwed? All I want to do is present you as my boyfriend to my mother so she’ll be satisfied that I’m in a relationship.
Sheldon: So we’d be perpetrating a ruse?
Amy: Precisely.
Sheldon: And you haven’t fallen hopelessly in love with me?
Amy: Don’t be absurd. I find the notion of romantic love to be an unnecessary cultural construct that adds no value to human relationships.
Sheldon: Amy Farrah Fowler, that’s the most pragmatic thing anyone has ever said to me.
Amy: I trust this clarification allows us to return to boy-slash-friend-slash-girl-slash-friend status.
Sheldon: Of course. Would you like to join me for Chinese food?
Amy: Sheldon, please, you’re suffocating me.
Sheldon: My apologies. Good night, Amy.
Amy: Good night, Sheldon.