I don't do either of those things.
* I don't think there's actually any scientific studies proving brushing works, but the toothbrush definitely sheds microplastics into your body. Same with flossing.
* I don't see the need to completely obliterate all bacteria living on the surface of a part my body just because I touched my penis for a minute.
* I don't use shampoo either, it was brought from India just 200 years ago. Anti-dandruff shampoo isn't real and we don't even know exactly what causes it.
Outwardly I'm a pretty normal person.