[Suzu]

Psycho, those weren't tattoos. Gaku Sano and Yutaka Kobayashi just love to paint their skin for stage shows, they've done that pretty often in the past. Tattoos are something that is still rejected in Japanese culture as it's heavily associated with the Yakuza, the Japanese Mafia.

As for the bathing and shower scenes: It really is not that much of a "getting past censors" thing, because especially bathing is an important part of everyday life in Japan. Families usually have a bath together, so for a kid it's no big deal to just see someone else in a bathtub. And before you bathe in Japan, you have to shower to not get the water dirty (because everyone may have a bath whenever he/she wants). As for the fanservice aspect: Yes, of course those scenes play with the fact that the character is nude, but they never show too much(- because it would have to be pixeled out even in porn ).

As for the ikemen aka pretty boy casting: it was originally a thing to appeal housewives and yes, there is still many moms who join their kids for that reason. But these days, Kamen Rider has an impressive young female demographic, from teens to young adults. Just to give you an idea, on both days I was at Kamen Rider the Diner, about 90% percent were young females around my age. At the Drive live viewing of Drive's final stage it was pretty much the same, with a tad more kids mixed into the audience. This female audience is who all the magazines with model photos are aimed at, the actor calenders etc. And many girls watch it because of those ikemen actors. That's why a relatively unimportant sidekick like Zack/ Kamen Rider Knuckle got his own movie, you know.

Also, can't deny this is part of why I watch those shows as well. I do own several photobooks of the actors, including three signed copies of Inaba Yu's (Gou/ Kamen Rider Mach).