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Vac-u-lock- Used primarily by Doc Johnson, Vac-u-lock dildos have a rippled hollow in their base, which fits onto a matching plug on the harness or other toy. The advantage of this design is the dildo is firmly attached and can not easily rotate, and does not tend to flop downwards or slip like ring harnesses, as well as there being a wide variety of other devices the dildos can be attached to, such as handles and inflatable balls. The disadvantage is the relatively low availability and high cost of compatible attachments. A number of brands have non-compatible clones of the vac-u-lock system, but dildos and accessories for them are virtually unavailable. |
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Double-ended attachments- While a double dildo obviously would provide stimulation to the wearer as well, the standard straight dildo is very poorly suited for harness use. To overcome this, many dildos are available for harness use that have an offset in the middle, with the main attachment and a smaller vaginal attachment for the wearer having a flat vertical section between them. This way, the main attachment is at a good angle and position for thrusting, while its movement is transmitted directly to the vaginal plug and clitoris of the wearer.
A special example of this is Feeldoe, which has an egg shaped bulb designed to be inserted into the vagina or anus of the wearer. Due to the shape of the dildo, thrusting on the main dildo translates to lateral movement of the plug, providing great stimulation to the wearer. Additionally, the shape of the plug allows it to be used without a harness in many instances. |
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