To demonstrate their "potency" and maintain without "premature ejaculation" during sexual activity is the wish of most men. However, some men always feel incapable; they "surrender their arms" not long after the "battle" begins, bringing the "fight" to an end before their wives reach sexual climax. Someone once summarized ancient bedroom techniques in one sentence: men delay the onset of orgasm, reaching new climaxes together with women. Therefore, men maintaining without "premature ejaculation" is a generally concerned issue in sexual matters. There are several methods that can help men last longer, promoting harmony in the sexual life of couples.