Son of biohacker who spent $2m to ‘stay young’ speaks out after controversial ‘erection test’ with his own dad goes viral

The son of a biohacker has spent millions trying to keep his body young has responded after an 'erection test' between him and his father went viral.

Bryan Johnson is a 47-year-old biohacker and entrepreneur who, for the pasr five years, has spent more than $2 million (£1.6 million) on trying to reverse his physical aging process.

Hailing from Utah in the United States, the businessman certainly has the financial means to do it after selling his payment gateway company Braintree to PayPal for $800 million (£642 million) back in 2013.

Using his cash to invest in ways to slow down his aging process and then reverse it, Johnson claims to have the 'cardiovascular fitness of an 18-year-old'. He's even recently starred in a new Netflix documentary on his journey, with the trailer watchable just below:

But it's not Johnson's cardiovascular fitness that has hit headlines this week.

Instead, it's been comparing his 'night time erection data' to, well, his son's. And no, we are not joking.

Johnson has a 19-year-old called Talmage Johnson, who himself is a bit of a fitness and health fanatic.

Bryan and son Talmage working out together (Instagram / talmagejohnson_)

In a post to X (formerly Twitter) and Instagram, dad Bryan wrote: "Nighttime erection data from my 19-year-old son, Talmage Johnson, and me.

"His duration is two minutes longer than mine.

"Raise children to stand tall, be firm, and be upright."

This was alongside screenshots of an app that, somehow, tracks their 'erection episodes', how long they last for, and the 'quality' of them. Nothing like a bit of father and son bonding.

Talmage now follows his dad's way of life (Instagram / bryanjohnson_)

The internet received this in typical fashion, with it viewed by more than 22 million people. One person wrote on X: "I guarantee you this sentence has never before been uttered in the English language."

A second posted: "I don’t even want to know how you measure this."

And a third took to Instagram to to say: "Okay I’m usually cool with your posts but this one is a bit weird.

"I don’t think dads should be talking about their kid's hard ons."

And a fourth added: "There's still time to delete this."

The tweet, seen more than 22m times (X)

With the incident going viral and reported across the world, son Talmage took to Instagram to respond to the test between himself and his father.

"I am grateful for the way my dad has raised me," he simply wrote.

His reaction should probably come as no surprise, going by other posts from the younger Johnson, who revealed earlier in January that he has moved to California to live with his dad.

Part of doing this involves being 'fully committed' to his father's way of life, from diet to sleep schedule and, you've guessed it, erection testing. Each to their own, I guess.