Double-ended dildo. Associated with lesbian love making devices, double-ended dildos are also used by heterosexual women for anal and vaginal simultaneous penetration. This dildo is usually made out of the soft flexible material (such as plastic or some form of rubber) that allows changing the shape of the shaft like the user wishes: to bend in the c-shape or to straighten it. In the past, though, they were often made of wood: Haberlandt (1899), for example, illustrates a straight double-ended dildo of this kind from late 19th century

Zanzibar.

Anal and vaginal stimulators on the single shaft. These types of dildos or vibrators are intended for stimulating the user anally and vaginally. One shaft of the smaller length and width is attached to the other one that are both inserted stimulating anal and vaginal erogenous zones in a woman. In a vibrating sex toy there can be two motors in both shafts controlled together or separately.

Kits of two separate vibrators or dildo used simultaneously. There is a kit of vibrators and dildos that are not connected with each other or connected by a wire attached to the single control panel. They are used simultaneously or separately stimulating the erogenous zones of both partners. This type is more mobile and one can offer much more possibilities for love plays with or without partner(s).