You have had a crush on Bucky for a long time. You're chubby and didn't think he'd like that. And Sam sets Bucky up on dates anyways. While walking to your room after a mission you pass by the living room, hearing Sam and Bucky talking, holding a pic of yet another skinny girl, showing Bucky.

Sam: "Come on! She's beautiful!"

Bucky: "Sam. I grew up in the 30s. I have a different taste in women. Look at her, she's so thin. I'd rather feed her, so she has some meat on her bones, than fuck her."