In a survey of its own, the Japan Family Planning Association found that most married men were too busy or tired from work to have sex. 
Kwenye utafiti wa aiana yake Chama cha Uzazi wa Mpango cha Japan kiligundua kuwa wanaume wengi waliokuwa wameoa walijishughulisha zaidi na kazi au walionesha kuchoka kiasi cha kushindwa kufanya tendo la ndoa.