Why can only men make sushi in Japan?

It is widely believed that the best cooks are men. Although cooking is mainly done by women, it is considered to be one of the most masculine professions.

This is considered by many to be a scientifically proven fact, as man have more creative approve about cooking. In addition, it is believed in Japan that sushi can be prepared only by men, because a woman's body temperature is higher than a man's, it can adversely affect the quality of food. However, it is known that women order sushi more often than men.