Convince Me You Deserve the Last French Fry

I have a typical girlfriend when it comes to her wanting to eat the food I ordered on top of her smaller meal. Today is no different, but I'm going to make her work for it today.

"Oh just give me the fry." She says.

"No. Convince me that you deserve the soon-to-be last french fry." I say through a mouthful of burger.

"You love me. That's why." She says with a devious smile.

"Yes, I do love you, but I love this french fry more. Try again."

She sits there pondering it for a minute.

"I put up with your games like these..."

"OH! Solid burn! But you see, this french fry, doesn't insult me."

"Does the fry occasionally buy, or do things for you?"

"No, but it doesn't have to. That's how much I love it."

"Well, you see, unlike it, I have legs which I can use to walk home, throw your stuff out the window, and effectively evict you. So that's why I deserve your last fry."

"Is this your final addition to your case?"

"That depends on your decision." She says with that familiar devious smile.

"I hereby conclude you deserve MY last french fry, both because I love you and because I want to stay in my own house. The case is rested until the next visit to McDonald's."

"Smart decision, mister."