I don't care about hygiene
Why do you think that it is okay to smell?
My friend said that hygiene doesn't make you more beautiful.
Sometimes you can feel too tired to go shower and it is okay once in while but not caring about hygiene at all is wrong. It could cause health problems.
Who says it's a bad thing.
It is bad because if you neglect it for too long it can cause issues. It is important to care about being hygienic.