Not to sound alarming, and I'm not trying to read into this too much, but you should know that it is considered a symptom of depression, or some other psychosis, when someone stops taking care of their own personal hygiene. Feeling "lazy" about washing your body, or that this task is "too much work", are signs of depression. It's not considered normal for someone to neglect their personal hygiene.
You may not feel that you are depressed, but are there other hygiene or personal care tasks that are also getting neglected? It's a slippery slope. Even asking here, about how to accommodate this behavior, shows some acknowledgement that this is not normal. Cologne and deodorant don't count.
I'm not a doctor, so don't consider this as a diagnosis. However, this is not normal behavior and I hope you get motivated to either change your behavior or look into discussing how you feel about this with someone who is qualified to give you their professional opinion.
Web search on 'depression not bathing'.