Which towel to use

Someone, as in all of womankind, needs to explain to me why it’s improper to use the same wash towel I use on body, to clean pee stains from the rim of the toilet?
Using the very specific syntax of cleaning my dirty body first, proceeding to the pee-stained porcelain rim second before depositing the wash cloth into the dirty clothes pile, I don’t see anything wrong with this move. In fact, it shows promise that I’m evolving…cleaning up after my own messes.
Besides, I thought that was whole purpose of laundry detergent.

Hard as I try, I can’t understand this logic.
It seems to follow the same logic as my being scolded for drinking directly out of a milk container, despite my tongue-kissing the scolder only a few hours earlier.

Secretly, I think she believes I gave her this big wet kiss, then scurried down the hallway, grabbed the dirty washcloth, washed my face with it so I wouldn’t go around smelling like lady-love all day long, then rushed to fridge to guzzle milk out of the carton.

She would be right.
Only, again, I thought that was the purpose of soap.
Who teaches you women all these fucking weird rules anyway???