At the risk of getting in trouble with Instagram, where explicit shots aren't exactly tolerated, he decided to censor his manhood with the Portuguese flag, writing: "Amazing to announce a partnership with Tourism Portugal! Not really, just had no shorts after my surf today.
"All things aside, clearly I activated full blogger mode, but this coast is something special!"
The only thing is, while he'd remembered to cover up his privates, it looked like there was something else he'd forgotten to take care off. Go on, scroll up and look again.
Aaaaand there you go.
As you'd expect, the comments section soon became transfixed on one thing, with one person writing: "Hahaha brother!! Was leaving the shadow a tactical play??!!"
Someone else said: "Once you see it, you can't unsee...and I ain't complaining."
A third said: "I mean, after this post, i think tourism in portugal is about to go up by 100%."
Another added: "Ok, WOW, that shadow leaves little to the imagination."
But not everyone was completely convinced by the unusual shadow, with many saying it was 'fake' as the angle and proportion didn't make sense based on what had been censored by the flag.
"I'm trying to do the math," one sceptical Instagrammer said.
"Ahahaha yeah of course it's a fake shadow," another agreed.
Someone else wrote: "It's obvious it's a fake shadow which screams even more of desperation."
Youngquest, 35, used to play rugby for the likes of Castleford Tigers, Celtic Crusaders and Gateshead Thunder, as well as in the National Rugby League in his native Australia for Cronulla-Sutherland Sharks, St. George Illawarra Dragons, Penrith Panthers and the Canterbury-Bankstown Bulldogs.
He has also modelled for Calvin Klein and was the face of a Paco Rabanne fragrance.
In a 2013 interview with GQ, he revealed how he's managed to stay in shape during careers that require his body to be in prime physical condition.
"I'm always in the gym - I've been lucky because I've played sports for so many years, so I know what to do in the gym and how to stay fit," he said.
Asked whether or not rugby players have to pay more attention to their grooming because of the changing room culture after games, he continued: "When you're in a group of men, some people look after themselves more than others.
"When I was playing rugby in England, some people would go in [to the changing room] after training, just grab their bag and get in their car. But for me, looking after yourself is very important. I was always the last one out of there!"
Featured Image Credit: Instagram/Nick Youngquest