An adult sex toy is an object or device that is primarily used to facilitate human sexual pleasure. Many popular adult sex toys are designed to resemble human genitals and may be vibrating or non-vibrating. The term can also include BDSM apparatus and sex furniture such as slings, however it is not applied to items such as birth control, pornography, or condoms. Alternative expressions include adult toys and marital aid, although "marital aid" has a broader sense and is applied to drugs and herbs marketed to supposedly enhance or prolong sex.

Vibrators are vibrating devices intended to stimulate the body. Vibrators come in a range of shapes and sizes, for internal or external use. Some vibrators intended for internal use are phallic in shape. Small vibrators may have a stretchy loop attachment for use as a finger toy or cock ring.

Rabbit vibrator, of which there are several variations, is a popular female sex toy popularized by the television series Sex and the City. It comprises an insertable shaft which often has additional functionality, such as rotation and internal beads or a thrusting action. Attached to the shaft is a vibrating clitoral stimulator. For most rabbit vibrators this comes in the form of "bunny ears" which sit each side of the clitoris.

Butt plugs are often shorter dildos intended for anal insertion. They tend to have a flared base to prevent the device from becoming lodged in the rectum. Butt plugs should not be shared with other people, due to the risk of blood-borne diseases, including HIV that can arise from the transfer of body fluids from one person to another. They should be used only for anal play and not inserted into any other orifice, to avoid the transfer of harmful bacteria to other parts of the body. These bacteria may persist through cleaning.

A penis extension is a partially hollow device like a very short dildo, with the hollow end placed on the end of the penis, intended to increase the effective length of the penis, again for the benefit of the person being penetrated. These are generally worn with condoms to prevent them from falling off during use.