Tokyo (CNN) Japanese millennials just aren't having sex. That's according to a government survey published last week, claiming that 42% of men and 44.2% of women -- almost half of Japan's millennial singles aged between 18 to 34 -- are virgins. While some prefer it that way, others would like their fortunes to change, with 85.7% of men and 89.3% of women harboring hopes of marriage in the future. The survey did not look at same-sex partners. Japan's lack of interest in sex is blamed on everything from a stagnant economy to Japanese manga fans favoring fantasy over reality. Changing social norms