I want a bigger couch.
Why? You're going to be in the kitchen most of the time anyway.
Bigger Couch
Explanation
Explain Bear
Listen up, buttercup. The joke is about how one person wants a bigger couch, but the other person roasts them by saying they'll be in the kitchen all the time anyway. It's like saying, "Why bother getting something nice when you won't even use it?" which I'm sure you wouldn't understand since you don't do anything.