Thor, Bruce, and Clint watch Zaboomafoo together when no one else is in the tower.
Natasha and Bucky love to speak Russian to each other. They think it’s cool because no one in the team can understand them and they can have private conversations.
The first time Peter Parker met Tony he started hyperventilating an passed out and Tony had to take him to the hospital.
Tony loves both Rhodey and Pepper. The relationship the three of them have is technically polyamorous… but they don’t like to label it.