*as a kid Luffy wanted to join shanks crew. Shanks was his friend who saved him from a sea beast. And when shanks was in a bar

Luffy saw a chest and opened it on the floor. There was a devil fruit inside the “gum gum fruit” he calls it. Luffy being the idiot he is ate it.m

Shanks saw Luffy eating something and looked over from His drink, and so did the bartender*