Tony:
You would usually wear his hats and ties. You would jokingly put them on and mock him with a glass of champagne and a sarcastic attitude. He just entertains you and in the end pulls you by the tie and gives you a sweet kiss on the lips.
Steve:
You would steal his flannels or jackets. Especially during winter, his jackets are huge on you and they are so comfortable. It also smells like him. You even have that one special flannel that you always snuggle with when hes out on missions. He loves seeing you in his clothes so he doesnt mind.
Thor:
You would steal his cape. His cape is really cool so you usually try it on and try doing your best impersonation of Thor. This ends up making the both of your stomachs hurt due to the laughter.
Bruce:
You borrow his lab coat. You are his partner in the lab but sometimes he has work outside so you would sneakily wear his labcoat as it smells and reminds you of him. And when he returns late at night, he'll find you asleep on a pile of books with your glasses on your head, a pencil in your bun and you snuggling into the coat.(He finds you super adorable then)
Clint:
You would steal his shirts. He has alot of plain shirts and they are actually really comfortable. This led to you putting on his shirts especially on your lazy days. You'll wear his over sized shirt which reaches mid-thigh with a pair of his boxers and your hair in a messy bun. He loves seeing you like that.
Bucky:
You borrow his caps. When you have to go out and you're too lazy to do your hair, you'll just pick up on his caps and go out. He doesn't mind. Both of you would have caps on and he loves how sporty you look with it on.
Pietro:
You borrow his sweatshirts to go for morning runs. They smell like him and are oversized on you. You love how comfy and warm it is. While running your usually route, you'll feel a breeze go past you and you'll know its him after seeing the small gifts he places in your hand. Some of the gifts are drawings, notes or freashly picked flowers.