Viewers Left Cringing After Couple Have 'Failed' Threesome On Bizarre New Channel 4 Show

Open House: The Great Sex Experiment sees couples invited to a swanky retreat to explore their relationships and try new things.

However, one couple's adventure didn't quite go according to plan.

Nathan and Mady wanted to see what it would be like to have a threesome, and invited a woman by the name of Precious into their bedroom.

Speaking ahead of their encounter, a very excited Nathan said: "It's going to be so good, more women, more pleasure."

But it proved to be a bit of a turd sandwich for poor old Nathan, with Mady and Precious getting on like a house on fire, leaving him feeling a bit left out.

At one point, Mady was heard saying: "It is a shame we can't go off and leave him to sleep."

The whole experience caused huge ructions in the relationship, with Nathan saying he was unsure whether they were right for each other.

He told Mady: "You've made my first experience a bad one. You purposely made me feel like a spare part. Your biggest fear about being the odd one out, you've put that on to me."

It wasn't just Nathan who had a terrible time, though, viewers watching at home didn't seem to enjoy it either.

Writing on Twitter, one person said: "This is the most uncomfortable I've been watching a TV show."

Echoing the horror, another chimed in: "Nathan has got the hump because his girlfriend had the most fun. He wouldn’t have given a s**t if the other girl had been interested in him."

A third said: "Channel 4 is mad isn’t it? They show people baking one night and a televised threesome the next. Crazy."

While another added: "Well that was the most Channel 4 thing I’ve ever watched."

But it didn't all end in tears for Nathan.

He and Mady managed to patch things up and jumped straight back on the horse and into bed with another partner, Grace.

And they had a much more successful experience.

Well, they do say practice makes perfect. Just maybe don't invite the cameras next time, lads.