A lot of Japanese are sensitive about smell and care about body odor and bad breath. In addition, even if oneself doesn’t notice their own smell, their family would find it unpleasant.
Especially the unique smell of a middle-aged man doesn’t go away from their underwear even if it is washed. An item to get rid of the smell is being sold. When using it with a detergent, it does not cover it up by giving perfume but it deletes the smell from the source. Fathers that work for the family however, are not welcome to their family due to their smell.