性行為的基本類型

在男性，有意的自我性刺激也可以採用多種不同的方式。多數的例子裏，的確是用了雙手來進行自我性刺激。因而，男性可能會用手撫弄、摩擦或撫摸他們的陰莖，直到達到性高潮。與此同時，他們也可能用一隻手愛撫身體其它的性敏感區。例如，為了增強全面的性喚起，他們可能觸摸和托起陰囊，或把一根手指插入肛門。甚至有一些非常罕見的刺激方式，那就是用諸如電線等堅硬物體插入尿道，以達到刺激作用。（不用說，後者的行為會導致疼痛和有潛在的危險。）市場上有數款機械的甚至電動的男用自娛輔助工具（真空泵）出售。這些對陰莖施加某種有節律刺激的小物件對那些生理殘障者或罹患性功能障礙者，可能具有某種治療用途。可是，作為健康的男性，似乎不需要在更為“傳統的”自娛方式之上增加這種自我性刺激方式。

“性輔助工具”

現今在許多國家，各種各樣的“性商店”出售“性玩具”或“性輔助工具”，例如：（左）由透明而硬質材料製作的真空泵，被設計用於促進陰莖勃起。（右） 直流電振動套管，用軟質材料製作，用於輔助性刺激。

“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.