The men all have small equipment - South Park said so!
They are just strange and weird people. Ran into a horde of Japanese tourist when I was in Canada. Canada must be a destination point for the Japanese. They have no sense of personal space and not touching strangers. They had no compunction about shoving you out of their way in a shop if they saw something they wanted. They also had no problem with mowing you down if you got in the way of a large group of them following their tour guide. In a waiting line, they shoved and pushed you.
Needless to say, when all of the above was performed on my person, I turned and gave them the lethal evil eye and growled at them. They learned that the American was not to be touched, shoved, pushed, mowed down or hurried along. And god help them if they tried to cut out of line and not await their turn in the women's restroom! Japanese - the other species.