Where should we go in Japan?

I was warned to never stray past the 3rd floor of the Manga shops in Akihabara because the porn gets weirder the higher you go. What I heard was, start on the fourth floor and work your way up and after warning Angelina, it seems she heard the same thing as me because she demands we go higher than the third floor. God, I love her. Check back in, like, share and comment, especially if you have been to Tokyo and can give us some useful tips or ideas.