Basic Types of Sexual  Behavior

1. Sexual Self-stimulation: Masturbation

Females

Females may use one or both hands to masturbate. Most often they manipulate the entire vulva, or gently stroke the glans of the clitoris and the minor lips (labia minora). Some women simultaneously play with the nipples of their breasts, and, in some cases, this breast stimulation alone may lead to orgasm.
Instead of using their hands, both females and males may also simply rub their sex organs against some object, such as a pillow, a towel, the bed cover, or the mattress. Indeed, some females reach orgasm by riding a bicycle. Many females can also masturbate by crossing their legs or pressing them together while moving rhythmically back and forth. In certain instances, rhythmic muscular tension alone is sufficient to produce an orgasm.
Many men imagine that women insert their fingers or some cylindrical object into the vagina when they masturbate. However, women who insert various objects deep into the vagina often do so only to please and entertain men. The objects used for this purpose are usually simple household items, such as candles or cucumbers. Well known since ancient times is the artificial penis or dildo (probably from the Italian diletto: delight). Dildos are made of wood, rubber, or plastic. Today there are also other masturbation aids on the market, for example penis-shaped electric vibrators. There are also some vibrators or massagers which are meant to be used on the external sex organs. Such devices provide a much more effective sexual stimulation than could be achieved by vaginal insertions.

Three types of vibrators