Fourway

A fourway is when two couples share their partners with each other. A bit like a foursome but not all participating in the 'activities' at the same time.

The act of having sex with a person on top of two additional people, with or without consent, but considered to be in the merger even though they are not active participants. This may also be referred to as a "Great Moment in Hook-Up History", when the two people are would-be cock blockers

Noun, activities associated with sex in which two people have sex next to, under, or on top of two other people.

A cyber or phone meeting between two people who are both simultaneously engaged in live sexual activity with two other people. The sexual energy from each couple adds to the arousal of the other couple.

Noun, activities associated with sex in which two people have sex next to, under, or on top of two other people.

A foursome with three girls and one guy

A sex position between four men, only possible in Outer Space or another Zero-Gee environment. Each man must be of an equal height and with similar body proportions. Most importantly, their penises must be of equal length and erections must stick straight out. Each man arches their back forward 90º and penetrates the anus of the man in front of them. When the fourth man penetrates the first man, a Fourway Sodomy Wheel is formed, in which all four men are simultaneously fucking and being fucked by eachother.