Tony;
You wanted to get it cause its cheesy and he wanted the piece that had a part sticking out, do i really have to explain why? Its Tony, just look at it.
Steve;
Once you showed him the movie Wall-E he fell in love with it, not as much as he loves you though, and he brought it up one night before bed.
Clint;
Its a bird, its Clint, its cute, like his ass.
Bruce;
You are both science nerds, but him more so being involved with stuff on earth where you liked anything and everything to do with space.(me af i want this!!)
Bucky;
He wanted something small he could hide on missions from other but still see it himself and think about how much love was in the tiny tree
Pietro;
After you watching Nightmare before christmas, he wanted a tattoo of Jack and Sally, but didnt know what type till you showed him a lock and key tattoo. He just combined them together.
Wanda;
She had always wanted the Yin-Yang tattoo with the person she loved, so after you two dated for awhile she brought it up and a few days later you got them.
Natasha;
She wanted something she could hide, like bucky, but didn't want something you couldnt really see, she wanted to show the love you two had for each other, she showed you one similar and a few weeks later you got them
Thor;
Even if he may be a God, he still hates needles and anything of the sort, so you finally talked him into this cause it was simple and small.
Loki;
Thor and Bucky combined kinda lol