It's no secret that alternative relationship styles like polyamory and open relationships are growing in popularity.
For those unfamiliar with the concept, a throuple is exactly what it sounds like - it's three people who are all in a romantic relationship with each other.
The former professional boxer, 42, appears to have two girlfriends, Una Healy and Sian Osborne, and he seemingly confirmed the unusual dynamic at the fight between Chris Eubank Jr and Liam Smith at Manchester's AO Arena, where he was a spectator.
When asked about the relationship, he said: "I like to keep my private life private."
However, the former boxer appeared to confirm that there was more than one lady in his life with what he then added.
He said: "I let people in through my social media a little bit, but what I do behind closed doors is between me and the girls involved.
"So yeah, I don't really want to go into all that."
As reported by the Sun, Haye's throuple relationship was made possible thanks to the celebrity dating app Rya.
He made a profile there with his then-singular girlfriend Sian during the summer of 2022 and the pair went on the hunt for the perfect addition to their relationship.
It was there that they ultimately found Una, who rose to fame as a member of the girl band The Saturdays.
A friend said: "David and Sian created a profile on Raya to find the perfect partner to enter their relationship.
"The app is very exclusive and discreet - which was perfect for them exploring their options.
"David and Sian were very much in this arrangement together and after being together for two years decided to open their relationship up."
According to the former boxer's friend, the profile was made under his name, but it did make it clear that he was looking to meet new women with his existing partner.
They added: "As part of their profile they said they were 'seeing what's out there', and said they wanted to try 'new experiences'.
"They spoke to a few people before being introduced to Una and they hit it off immediately."
The trio appeared to confirm their relationship with they posted pictures together after taking a holiday in Marrakech over New Year.
Alongside a picture of himself with his arms around both women, Haye wrote: "If a picture says a thousand words, then this one says exactly what it needs to.
"I've started Jan first with the correct energy, surrounding myself with understanding beautiful human beings, who do not judge, but instead accept me for my authentic self."
It is 2023, I guess.
Featured Image Credit: PA Images / Alamy / @davidhaye/ Instagram