Thank you for hosting this topic which gives an idea to people who are not familiar with the Japan traditions. I'm delighted to watch your video as they are all come with Chinese subtitle (tradition characters).
I'm an Asian, not a Japanese. My 7 years old daughter still shower with me in the morning when I have to make sure that she gets to school on time. Let's not overthink this matter with naughty thoughts. As parents, we are only concerned with our children's welfare.