Double Penetration

Double Penetration (DP) a nude girl fucking two boys at once, anal and vaginal. Picture from a video by HarmonyVisionDouble Penetration, or short DP, is, not only in BDSM, a poular way to enjoy a threesome. One partner is penetrated by two others at the same time. Sometimes the simultaneously use of two dildos, or one partner and one dildo is also described as double penetration, but here we’ll focus on the pure human version of the fun. As with many sexual specialities, there are several possible positions, all often described in metaphorical terms.

The classic, three partners lie or stand in parallel, with one between the other two is called a sandwich.
If  you perform oral sex on one partner while having anal or vaginal intercourse with the other one you are having a spit roast.
If all three perform a round dance of oral/vaginal/anal sex on one another simultaneously, creating a closed circle, it is called a daisy chain.
The one playing the middle role in a threesome, being anally and vaginal penetrated at once is sometimes named a lucky Pierre.

If two boys amuse the lady anally at once, she is receiving Double Anal or double stuffing, the latter is also used to describe the vaginal version.

Of course, a double penetration can be expanded into a triple penetration, for instance by combining a blowjob with a sandwich. From there it only a small step into groupsex and GangBang territory.