I guess there is a growing number of people that does start to notice the need to get cleaned down there.
I heard from friends that China girls don't shave is because they feel after being hairless they will lose money. Maybe connect that with 发菜 发财
It's hygiene to be clean and spotless. IMHO. But I know someone that insist the girl must not be shaved! He says it's sexy to see a bushy pussy
