Young people who take Viagra once in a while usually have no effect. Many young people, because of an unsuccessful intercourse, resulting in pressure during intercourse, worrying that the penis can not be erected, can not complete a reasonable intercourse. This situation can eat Viagra once, the main purpose of eating Viagra is to have a fuller erection of the penis, the quality of coitus completion will be better, thus building self-confidence and excluding organic lesions. After Viagra is eaten, generally within 24 hours, the drug will be completely metabolized, so it has no effect on the human body. Young people take Viagra, it can make the penis erect more fully, so that the self confidence will be better during intercourse, so it will not affect the future sexual life.