Tandem-biking 

The logistically difficult manoeuvre of walking as a couple whilst engaged in anal sex without withdrawing.

We were hard at it when we noticed the sunset; so we started tandem-biking over to the balcony.

Tandem-biking by Shaartvark July 18, 2016

Tandem Urination 

The point when you have become so close with someone that you want to share every moment, even taking a piss. The woman sits on the toilet spread eagle, and the man urinates between her thighs. Also, a great hobby for couples stuck in a rut.

Him: Babe, gotta pee!
Her: Me too! Let’s try out tandem urination!

Tandem Urination by Stoner Kathy November 19, 2017

Tandem War Horse 

When a person has cowgirl sex with one girl while another girl rides his face.

Melody and Trinity tandem war horsed me last night.

Tandem War Horse by Plunkinator May 31, 2018

Tandem Stupidity

An act of stupidity thought of by one person and executed by another.

This type of stupidity is associated with initiations of various types (usually dumb)and military service(hopefully not as dumb)

Was that real what I just seen or an act of tandem stupidity ??

Is that person really crazy or is there someone screaming through them in an act of tandem stupidity to discredit them?

Tandem Stupidity by Ragnar Funnies September 7, 2018

Tandem wheelchair ride 

When someone in a wheelchair acts as an amusement park ride attracting people of all ages to ride with him in his wheelchair

Hey baby wanna go on a Tandem wheelchair ride

Tandem wheelchair ride by Choptastic October 18, 2018

Tandem swing 

Swinging wholesomely with someone else on a swing in a park in verdun

Muji and Pete dominated a tandem swing

Tandem swing by Meej October 20, 2021

Tandem kayak 

Often considered the missionary position for a MFF thruple. It is when one woman sits on the man's face while the other woman rides his cock. Important that they are facing the same direction!

Hey babe's, I'm horny. Let's get home and ride the tandem kayak!

Tandem kayak by Summit Waterboy April 9, 2024