Sun’s out, buns out — and so is everything else when it comes to these two guys. 

While stark-naked on a beach and lying side-by-side on their backs, a pair of “Platonic Male Erotic Bonding” proponents, Will Blunderfield and Brian Carew, spread their legs wide open and warmed their bare testicles and anuses in the sun as an “intimate” yet “non-sexual” buddy ritual. 

And although haters call the display “gay,” the fanny-flaunting friends say their peculiar practice has nothing to do with sex. 

“Erotic male bonding is in our DNA as men,” Blunderfield, 37 and living in Vancouver, Canada, told The Post. “A lot of men want to be able to [physically connect] with their bro without going into gay panic, but they’re scared that their heterosexual identity would crumble.”

He continued, “Same-sex bonding through acts like butthole sunning is innate, it’s natural and it’s beyond ‘gay’ or ‘straight.’ It’s a vitamin that we need.”

Blunderfield described the activity as “a connection that is deeply nourishing, inspiring, and charging yet is not sexual” in the Instagram caption of footage from his and Carew’s sunning session. 

Video of their rump roasting racked up over 30,000 views. 

“This type of connection … I call it platonic male erotic bonding,” continued Blunderfield, who also calls himself a “sex kung-fu coach.”

“Most would say this is a form of homosexuality or bisexuality,” added the guru of the custom. “It is not.”

And he’s right. 

In fact, Blunderfield’s bum-baking routine, more popularly known as “perineum sunning,” has been praised as an all-natural energizing exercise by unconventional wellness influencers for years. 

The act first gained viral acclaim in 2019, when influencer Ra of Earth shared an Instagram post of himself and pals going bottoms-up in what he called “the original butthole-sunning video,” which has more than 104,000 views. 

He claims in the clip, “In a mere 30 seconds of sunlight on your butthole, you will receive more energy from this electric node than you would in an entire day being outside with your clothes on.”

But a 2021 study on the sunning stunt by researchers from Oklahoma State University deemed the trend “potentially harmful,” and emphasized that any alleged health benefits of the movement are “non-evidence-based.” And on TikTok, a New Jersey dermatologist warned folks of the cancerous damage that excessive sunlight could have on the skin surrounding one’s backside.

However, Blunderfield, the founder of Manhood Academy — a semen-retention training platform that touts “male bonding, non-ejaculatory orgasms, rewilding and male sexual transmutation” — insists his nude-dude bonding technique can benefit not only its participants but also the world as, well, a whole. 

“[Platonic male erotic bonding] is a type of nourishment that speaks to men building each other up, sharing deep moments, seeing each other fully in the nude and removing all shame, fear and doubt that society has placed on us within this context,” he wrote. 

“This world needs more men who can transcend the limiting labels of the matrix (heterosexual, homosexual, bisexual, etc.) and see that this work is about stepping into more glandular health and vitality together.”

And the labor of his mission doesn’t stop at men teaming up to toast their tushes.  

In May, he and Carew hosted a 90-minute “seed release ritual” workshop, which men can access for $55 to “platonically” ejaculate together via Zoom. 

The goal of the body-fluid-themed fête is to “learn techniques for harnessing and channeling sexual energy for personal and spiritual growth,” per the Manhood Academy site. 

Blunderfield told The Post, “Doing naked bro bonding, butthole sunning and seed release rituals, without shame or gay panic, it can actually enhance your [heterosexual] urges towards your female partner.”