A number of brands have non-compatible clones of the vac-u-lock system, but dildos and accessories for them are virtually unavailable. A 19th-century Chinese painting shows a woman using a dildo strapped to her shoe, showing that creative use of strap-ons was already well under way. This differs from a double dildo where both ends are phallic and a harness is required.
All methods have tradeoffs, and many couples will have different harnesses depending on which type of dildo they want to use. The major disadvantage is the dildo is often held loosely especially on cheap harnesses and tends to flop downwards, and the dildo often can rotate in the harness, making it difficult or impossible to use g-spot or other shaped dildos. 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.
Rotating beads provide extra stimulation of the vulva and vaginal opening when used for vaginal penetration or stimulation of the anus when used for anal penetration, while the various clitoral stimulation devices are generally intended only for vaginal intercourse. A typical double-penetration dildo has a longer, thicker main shaft for vaginal penetration, and a shorter, thinner, often more curved shaft for anal penetration. Almost every position associated with sexual intercourse or not, in the case of simultaneous penetration can be performed with a strap-on. The most common means of holding the dildo to the harness is to have an opening or ring in the harness through which a wide-based dildo is inserted.
You'll find that harnesses come in a wide variety of shapes, styles and sizes and can be tailored to fit virtually any fantasy scenario you and your lover have in mind. See also: Latex harnesses may or may not have the dildo s molded as part of the harness, and in either case, they tend to be floppy due to the flexibility of the latex. A number of brands have non-compatible clones of the vac-u-lock system, but dildos and accessories for them are virtually unavailable. Many people find that once they are familiar with the activity, the probe dildos are inadequate and unsatisfying, and purchase a standard dildo to use with their harness.