The attitudes of what's acceptable for male fashion in the US has become very constrained over the last 100 years. Take for example what's commonly accepted for the neckline of a t-shirt.... WOMEN: Crew neck, v-neck, scoop neck, boat neck, u-neck, etc. MEN: Crew neck Occasionally v-necks are considered acceptable for men, but generally only if the neck line is so high up that it nearly resembles a crew neck. Look at BR v-neck tees for an example of what it has to look like in order to avoid being mocked by the "that's gay" crowd within some social circles. Japanese fashion is more interesting since it is not as heavily constrained.