During a threesome when the girl has dicks both in her ass and pussy at the same time.
I had a threesome last night andwe had Double Sex, Billys dick was in my vagina and Johnnys was in my ass, they kept raming it in and taking it out...it felt amazing and brought me to the ultimate orgasm!
by theresadickinmypussy June 17, 2010
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When a male has his penis in a woman's vagina and his sack in a womans rectum
I just had double sex with your wife!
by the most manly man September 7, 2010
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Used to describe a sexual position used in foreplay where the man stands behind the woman, with his left hand on her left nipple, and his right hand on her vagina.

The man then proceeds to manipulate both parts of her body with the first and second fingers on each hand in a rhythmic fashion, ensuring that her nipple is gently squeezed between both fingers.

The position and action simulates that experienced by a double bass player.
Jesus mate, all she wanted was double bass sex, I was outa there.
by missadventure October 26, 2006
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A sex position derived from the infamous Eiffel Tower, in which two males and two females engage in sexual intercourse. It is identical to the original Eiffel Tower, except that the second girl is face down with her legs resting on the shoulders of one guy and her arms supporting her on the back of the other girl. This girl has her pussy eaten out while she makes out with the other guy. And the girl below her, blows one guy while she is fucked by the other.
"Hey Spencer! Do you want to double helix (sex position) Gabrielle and Grace tonight?"

"Definitely, Kyle. I'll make out with grace and fuck Gabrielle. You eat out grace and get blown by Gabrielle!"

"It's gonna be fucking legendary!"

"Hell yah!"
by Bill CLITton December 27, 2013
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Double Sex is when two people have sex at the same time.
John Sex: I heard that Jill Intercourse wanted to have Double Sex with me!

Brian Ass: Woah isn't that when two people have sex at the same time?
by porty64 July 8, 2022
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