In Japan, women who are 25 years or older are considered "undateable", an expired Christmas cake that's supposed to be thrown out.
There are plenty of women in Japan who are 25+ who has no history of dating men because they were focused in school and weren't out partying every weekend.
If you are a man and you are found out to be dating such women, you would be vilified and ousted from your friend group.
These Japanese women need shaving...