Traveling through the world of pirates, with full domineering power, I originally wanted to find an island to retire on, and open a bar to flirt with beautiful women.
As a result, Luffy and the Straw Hats had to come to his island for adventure, and his peaceful life was broken. In order not to be annoyed to death, he had to "wipe his butt" and gave birth to a daughter with the Empress.