You shouldn't wear dirty clothes out of the house.
Timmy just got home after a long day at a dirty job and now has to figure out the rest of his day.
Timmy wants run some errands.
Timmy decides to clean off the day's work by taking a shower before he heads out into public.
Timmy wants to get things done, so he immediately heads out while wearing his work clothes right after getting home .
Timmy looks presentable and doesn't feel self conscious while out and about.
Timmy runs into some people he knows and is embarrassed by his attire and lack of cleanliness.