So you see, here’s the problem. People should not associate ‘not showering daily’ with ‘offensive body odor’ because it’s simply not true. Of course people should wash themselves and take showers or baths. They should also wash their clothes regularly. Body hygiene is a blessing. Deodorants are useful. But all of this doesn’t have to be totally perfect. Especially for children. If they are too clean all the time, it can actually harm them.
Then of course there’s obsessive–compulsive disorder which is a mental disorder characterized by intrusive thoughts that produce anxiety, by repetitive behaviors aimed at reducing anxiety. People who obsessively wash their hands with antibacterial soap and hot water (to remove germs) can make their skin red and raw with dermatitis.
Human perspiration is largely odorless until it is fermented by bacteria. Body odor can even smell pleasant and specific to the individual. There’s the hypothesis that we select our partners based on body odor (to unconsciously identify a complementary immune system). See
http://en.wikipedia.org/wiki/Body_odor#Genetics
http://en.wikipedia.org/wiki/Obsessive-compulsive_disorder