I buy new Underwear every month. I'm naked at home and sometimes I go commando when I'm out plus I wash stuff everyday Soooo my underwear has limited shelf life and limited use. I have some nice underwear but it's mostly bikini cut cotton and disappears quickly:)
My silk underwear and boxers last a lot longer and I put more thought into buying those :)
Because working as grease monkeys is hard on underwear. The majority of women work in labor intensive jobs that involve a lot of motor oil and grease. It destroys underwear so why put a lot of money into new stuff?
Most men work as nurses and school teachers. They want to feel professional. They also want to come home after a hard day and be able to strip down and look elegant and sexy. These days that means most men by lacy g-string panties.
These are the irrefutable facts. I have loads of studies to back this up.