you absolute fucking baffoon, you incompetent idiot, you literal shit for brains.
there is a little thing called bacteria, BACTERIA, b-a-c-t-e-r-i-a, its cell found on the skin and on the inside of the body, to not overwhelm your kindergarden brain, bacterias are responsible for the bad smell on our bodies on top of a number of other things, when there are bacteries in our bodies we smell bad, when we bathe we get rid of most of the bacteria in our skin wich i s why we stop smelling bad but the bacteria in the air, the bacteria that comes from our sweat and other things makes us smell bad again after a day.
when it comes to the fecal matter and gasses, it also smells bad because of the bacteria in the stomach, the bacteria in the stomach is produced indeed by the food we consume and digest, here is a good boi star for getting that right, but the amount of bacteria inside the body can depend on your type of diet, if you consume junk food and proceded food, then your bacteria will increase significantly, if you have a healthy diet with fruits and vegetables the bacteria will be lower making your gasses and fecal matter smell less.
you cannot get rid of the bacteria, they are esential for a number of things in the body, how ever you can increase or decrease the number depending on your diet, someone with gut bacteria will not smell bad inmmidiatly after shitting if they have good hygiene, if they batch daily and wipe properly little to no bacteria will be left and you can still smell like a decent human being.
was that clear enough for you?, did i went to fast? don't hesitate to ask me any questions you might have, you might be retarded but is more important to ask stupid questions than to stay retarded.