So every morning Simon starts his day, he has a stretch in the Miami sun.
He's about 28 years old, he exercises regularly,
he drinks filtered water that takes out all of the microplastics.
Then he gets in the sauna, but before doing so,
he puts on his cotton boxer shorts with an ice pack attached to cover his testicles.
The BBC's Global Health Reporter, Jackie Wakefield, is telling us about Simon.
He's this guy that she's been interviewing for one of her recent stories.
He's actually doing this to boost his sperm count.
So Simon is one of the growing number of young men worried about their fertility.
So they're trying all these different hacks that are being promoted on TikTok, Instagram,
boosted by different influencers to up their sperm counts.
Maybe you've noticed influencers promoting activities to increase sperm count.
Many also claim the average man's sperm quantity and quality is dropping.
And there is some data to back this up.
One review found sperm quantity had dropped by 50% in the past 50 years.
But how solid is the actual evidence?
Does it do you any good to strap an ice pack to your bits?
And do doctors agree with any of this?
How does all this play into modern anxieties about what it is to be a man?
From the BBC, I'm Tristan Redman and I'm Asma Khalid.