Double Dildo
One of the most significant benefits of double penetration is that it allows partners to achieve dual orgasms, double penetration is a way you can work to maximize your partner’s pleasure and experiment with new ways of getting them off. They are manufactured from a variety of materials which are flexible and easy to bend. Such materials include latex, glass, and silicon
The double dildo can be used solo or as a couple:
Couple use
Fancy a dildo but don't want to leave your partner out of the fun? The double dildo provides the solution. It can be used for vagina-vagina (Some women use the double-ended dildos as part of their sex toy play with another woman. The double-ended nature of the dildo allows penetration into the two vaginas simultaneously) or anus-anus penetrations (Most double-ended dildos can be used for anal penetration of both partners).
If you're playing together, then you'll want a double dildo which is a bit firmer. Balance and positioning are the main issues when using a double dildo with a partner and one can experiment to find out what works for them. Alternatively, if you want to combine the double thrusts of the twin dildo with powerful vibrations, the double-ended vibrator is perfect. They have a short, stunted end that sits internally and a longer end which sits outside the body for maximum pleasure.
Solo use
Vagina-to-anus-Most of the double-penetration dildos are designed for simultaneous stimulation of anal and vaginal erogenous zones, but in the case of elongated "double-headed" devices, it is possible to use the same device simultaneously. If you're solo, a flexible double-ended dildo is easier to get to grips with. It might feel wobbly and unwieldy at first, but by bending and twisting it, you'll find that it becomes much firmer. Choosing one that has one slimmer end makes anal penetration easier for beginners. This can even be used for pegging; when a woman penetrates the anus of a man.