Short skirts were made fashionable in recent times in the 60ies by the women’s liberation movements insisting on freedom to dress at they wanted.
but short skirts are common throughout different cultures and times and have been common clothing items for women - and men! - in eg latin America and Africa. Come
to think of it, one of the most famous Iron Age remains found in Denmark, the Eigtved Girl, look it up, was wearing a very short skirt.
fashion comes and goes. Men blaming women for sexual assaults seems to be an enduring trend, however.