Being well presented, clean and tidy, people can feel more confident especially in social situation.
Maintaining a good hygiene helps reduce the risk of ill health, but equally importantly affects how we and others perceive ourselves and can influence our level of confidence and self esteem which can affect so many aspects of our life.
Someone with mouth and body odour will have a low self esteem psychologically he feels their is something wrong with him and cannot measure up to other people, this will affect him in all aspects of life.
Now imagine you see life cockroach on someone's body or cloth... What will go through your mind?
Imagine the guy/babe sitted next to you on the plane has a massive mouth odour what would you do? Probably request for a change of seat... How do you think he/she will feel knowing that's why you don't want to sit next to her?
Maintaining a good personal hygiene is of a great importance.