I haven't met people that completely changed like that, so to me it's too unrealistic to be funny, especially repeatedly. We all know examples like Haley Joel Osment, but even he has the same general appearnce kid or adult, doesn't matter. I don'T know. This "joke" just feels gross, like Fujimiya underwent surgery or something. Can't help but now enjoy this joke. Fortunately, the other jokes are great.