Steve Rogers:
Steve was always confused when you were on your period, he would question everything. After he got the concept, he was so sweet towards you. But he would always end up blushing when you mentioned it.
Tony Stark:
Tony just didn't like the fact that you didn't want to have fun time. But he was still very sweet to you, and would treat you like a queen.
James Buchanan Barnes:
Bucky just wanted you to be happy. So he was always very, very sweet. He would become extra protective when you were on your period, when the guys would tease you, Bucky just went full on possesive mode. It was adorable.
Bruce Banner:
Bruce got very shy, he understood what periods were, and he always got very shy, but he would still be the sweetest little guy. He was always very protective, more then ususal, when you were on your period.
Clint Barton:
Protective with a capital P. Wherever you went, Clint was basically your shadow, not that he wasn't like that everyday, he would always get everything you wanted, and if you wanted cuddles, Clint would drag you to your's and his bed and cuddle with you.
Thor Odinson:
He had no clue what a period was, but when he figured it out he was very sweet to you. He just wanted you to be happy, and whatever made you happy he would do, including giving up his precious poptarts.
Loki Lauyfeson:
Same as Thor, just forget about the poptarts. :)
Sam Wilson:
One word: Sweet.
