Traditional double penetration includes fucking her ass and pussy at the same time, grinding her perineum the skin between her holes as you and your partner pump in unison like lumberjacks working a two-man saw against a redwood tree.
You've never heard a mature woman scream out as powerfully as when she's getting banged both ways, and they're calling for you to join them.
You can drool over lesbian hotties fucking each other in all orifices with their favorite toys and squirting out in pleasure.
Of course if three of you bang her mouth, pussy and ass at once that's no longer a double penetration porn video because you have taken it to a new level by going triple penetration on your porn whore friend instead.
The costars look at each other and try to decide who gets to bang which hole, ad they divvy up the deepest treasure their new female playmate can give.