Roger got bored and he decided he'll throw that hat,and when he was about to throw shanks came and said
shanks - "Roger san are you going to throw you're hat"
Roger - "yes my hair falls too much when i put this f*****g hat,I want this sexy hair of mine"
Shanks - "but that hat looks really gud on you,but i guess you don't have a choice.....If you're going to throw then will you pls give it to me"
Roger - "What!!!!! I just said my hair falls coz of this hat,and you have a great red hair i don't like to say this but you have a nice hair than mine and you want that sexy hair to be gone, No.... i don't want that to happen"
Shanks - "My hair is very strong i use whale oil every knight,so it's really,really strong"
Roger - "ok if you want that badly i'll give it to u,but don't blame me later"
Shanks - " Ok "
Roger - " here"
That's how Shanks got Roger hat.................