TENGA Co., Ltd. designs, produces and sells safe, functional and hygienic pleasure products with the mindset of responsibly spreading correct knowledge of “sex and disease” through information and prevention awareness. TENGA has also been showing promise in the medical field. One such use of the TENGA brand is with Ejaculation Disorder. Of all sexual disorders, Ejaculation Disorder (the inability to ejaculate within a vagina) is next in line after Erectile Dysfunction. A likely cause of this disorder is the long-term practice of incorrect methods of masturbation – methods such as the “Push Method” (the act of rubbing or squeezing against other objects such as sheets or walls) or too strong a grip during manual stimulation.