Just... don't ask.
-.-
Train yawned, watching the stars peek through the clouds. Princess was asleep, Svenny was busy tinkering with his briefcase-thingy, and they hadn't encountered Creed in weeks. It really was a beautiful night. He blinked lazily, smiling slightly when the cat that had kept him company for the last hour shoved her head into his view.
"Nah, kitty, I'm not giving you any fish. You're sleek enough as it is."
She swatted lightly at his cheek before stalking off, not happy with having been refused. He laughed quietly. "Silly. You should have asked for milk. We actually have some of that."
Reminded of the delicacy waiting below, he stood and stretched, then reentered through the window. Reaching into the fridge, he pulled out the last bottle and looked at it inquisitively.
"Chocolate? Why would someone ruin perfectly good milk with that?" he wondered, sniffing at it. He shrugged and opened the milk. Golden eyes widened as he took a sip. "Well. Question answered."
He returned to his rooftop perch, humming cheerfully.
-.-
"Come with me, Train! Together, we will—"
"Sorry, Creed. I'm in love."
"W-what? Who is it? I must kill him!"
"I could never abandon my chocolate milk, not for anything in the world."
"..."
-.-
Reasoning: Chocolate is universally loved. Train loves milk. Therefore, he loves milk and chocolate combined even more.