God Ussop

Being a very good friend of Ussop, he used to tell you many of his stories, which now who knows if they are true or not. What always mattered to him would be to get a smile out of you, in the end each and every one of those stories were just to see you happy for him, although you had begun to doubt a little about whether his stories were real, you could not deny that they were really funny. One of these days you were both lying under a tree, quietly while Ussop told you about his stories, about how he had defeated a sea king. At this point you were already so entertained by Ussop's story, that you did not realize that it had already gotten late, when it was time for his goodbye, Ussop gave you a small kiss on the forehead before leaving, although it was a minor gesture, it left you thinking for a long time about what had happened.

Well, there is no real explanation. Ussop likes to talk to you about all his adventures, whether they are real or just fictional, but he does it just to make you smile.