性行为的基本类型

在男性，有意的自我性刺激也可以采用多种不同的方式。多数的例子里，的确是用了双手来进行自我性刺激。因而，男性可能会用手抚弄、摩擦或抚摸他们的阴茎，直到达到性高潮。与此同时，他们也可能用一只手爱抚身体其它的性敏感区。例如，为了增强全面的性唤起，他们可能触摸和托起阴囊，或把一根手指插入肛门。甚至有一些非常罕见的刺激方式，那就是用诸如电线等坚硬物体插入尿道，以达到刺激作用。（不用说，后者的行为会导致疼痛和有潜在的危险。）市场上有数款机械的甚至电动的男用自娱辅助工具（真空泵）出售。这些对阴茎施加某种有节律刺激的小物件对那些生理残障者或罹患性功能障碍者，可能具有某种治疗用途。可是，作为健康的男性，似乎不需要在更为“传统的”自娱方式之上增加这种自我性刺激方式。

“性辅助工具”
现今在许多国家，各种各样的“性商店”出售“性玩具”或“性辅助工具”，例如：
(左) 由透明而硬质材料制作的真空泵，被设计用于促进阴茎勃起。
(右) 直流电振动套管，用软质材料制作，用于辅助性刺激。

“Sex aids”
In many countries today, various “sex shops” sell “sex toys” or “sex aids”, for example:
(Left) A vacuum pump made of transparent, hard material, designed to facilitate an erection.
(Right) A battery-driven vibrating sleeve, made of soft material as an aid to masturbation.

1. Sexual Self-stimulation: Masturbation

Males

In males, deliberate sexual self-stimulation can also take many different forms. In a great number of cases, the hands are indeed used. Thus, males may fondle, rub, or stroke their penis with their hands until they reach orgasm. At the same time, they may also use one hand to manipulate other erogenous zones of the body. For instance, in order to increase their overall sexual arousal, they may touch and lift their scrotum, or insert a finger into their anus. There are even some very rare cases in which men insert a solid object, such as a wire, into their urethra for stimulation. (It goes without saying that this latter practice is painful and potentially dangerous.) There are several types of mechanical and even electric male masturbation aids (vacuum pumps) on the market. These gadgets, which apply some rhythmic air suction to the penis, may have a certain therapeutic use for the physically handicapped or for men suffering from sexual dysfunctions. However, for healthy males they do not seem to offer any advantages over more "traditional" forms of masturbation.