A Threesome Is Hot

A Threesome Is Manly's Distaff Counterpart. Also, the most common form of threesome. When taken Up to Eleven, we'll have two other bisexuality tropes: Everyone Is Bi for girls and No Bisexuals for boys.

Unlike the guys in A Threesome Is Manly, the girls in A Threesome Is Hot will view themselves as bisexual quite easily. Also, this is the most common threesome out there, so Truth in Television.

Comic Books

 * No threesomes, but two foursomes in the comics by Dori Seda.
 * In Cry for Justice, Green Arrow congratulates Hal Jordon on the alleged threesome he had with Huntress and Lady Blackhawk. An issue of Birds of Prey had Black Canary ask Huntress about this, and Huntress reveals that Hal just got drunk and passed out, making this a combination Take That and Retcon.

Fan Fic

 * Degrassi the Next Generation fanfic writers seem to have a thing for Jay/Alex/Paige and all sorts of Sean threesome fantasies.
 * In JLA Watchtower, Hal Jordan accidentally walked in on Arisia and Zinda Blake "fooling around." they told Hal to quit staring and join in. Hal, being Hal...

Film

 * Kim Cattrall, Dana Delany and Joshua Beckett in Live Nude Girls
 * Featured prominently in Wild Things
 * In American Pie 2 Steve Stifler has a threesome with two hot women whom he mistakenly believed were lesbians.

Live Action Television

 * How I Met Your Mother featured an episode where Ted met up with an old one-night-stand (which he was too drunk to remember the details of) and her old sorority friend and was close to "Riding The Tricycle" as Barney called it. The episode revealed Barney had come close to riding the tricycle but
 * The same episode featured Barney refering to the other type of threesome negatively by calling it "The Devil's Threeway"
 * An episode of Coupling focuses on two lead male characters trying to get into one of these threesomes ("It would be like a breast octopus!"), only to find out a woman is trying to get into the other kind with the two of them.
 * Nip Tuck features several, including one for Matt with his cheerleader ex-girlfriend and her girlfriend and Christian with a mother-daughter combination.
 * Entourage has E and Sloane having one with one her friends. E wakes up the next day spooning the wrong girl. Hilarity Ensues.
 * One Leverage episode has Parker stumbling in on The Mark's daughter making out in a food pantry - and being invited to join in.
 * Bo has one with a married Fae couple in Lost Girl.

Pornography

 * Too many to count.
 * Even listing those without are still too many to count.

Religion and Mythology

 * Threesomes with a mother and daughter are forbidden by the Bible.
 * Which is precisely why the Devil (played by Gabriel Byrne) pulls this off in the movie End of Days.

Video Games

 * Alistair excuses his acceptance of a threesome with the player character (female only) and Isabela in Dragon Age with "What can I say? I'm a weak, weak man."
 * Whereas Leliana will insist on coming along with the player character (male or female) and Isabela in order to keep an eye on things...
 * Similarly, in Dragon Age II, Hawke can imply this during conversation with Anders (if pursuing a relationship with him): the third party in this instance is  It's even lampshaded later, by Isabela.
 * In the first Mass Effect, this is one way of resolving the Love Triangle with Shepard.
 * In Jade Empire it's possible for a male character to have a threesome with Dawn Star and Silk Fox.
 * The Witcher 

Western Animation
"Cat Noir: Wow! Two Ladybugs? I must be in heaven!"
 * Miraculous Ladybug; in a case of Getting Crap Past the Radar'', n the episode "Timebreaker", some Time-Travel shenanigans cause two Ladybugs to appear at once. Cat Noir, who has a crush on Ladybug, says this.