The narrowest artery in your body is the first one to close

One and a half millimeters. That is the diameter of the artery that fills the penis. The artery feeding the heart is around four. The one in the neck, carrying blood to the brain, is six.

All three are lined with the same tissue — a single layer of cells called the endothelium. All three see the same blood sugar, the same cholesterol, the same pressure, the same cigarette smoke.

So answer this honestly, because nobody is listening.

If plaque starts building in all three at once, which one closes first?

Which is why, for a great many men, sexual function declines before anything else in the body gives a sign. Not age. Not stress. Not a partner losing interest.

The narrowest pipe closed first — and said so.

He was fifty-two

Worked in retail. Overweight, with the kind of belly a man lets grow because his trousers still close. Eighteen years married, recently divorced.

The first sign showed up while he was still married, and it wasn't what you'd expect. He stopped waking up with an erection. He noticed — and let it go, because it didn't hurt and he had too much else on his mind.

That is what happens to almost everyone. The first warning arrives at the easiest possible moment to ignore.

Then came the divorce, work pressure on top of it, and trouble with his kids. After a while alone he tried a new relationship, and couldn't. Inside an eighteen-year marriage a failure is humiliating, but there is history holding you up. With someone new, who has no idea who you used to be, the failure is the first thing she learns about you.

He spent eighteen months like that. Before coming to me he bought something off the internet that promised to fix it. Nothing changed.

I ordered the tests I order for every man with this complaint. Cholesterol, abnormal. Blood sugar, high. Cortisol — the stress hormone — abnormal. Weight above where it should be, concentrated in the abdomen.

A sugar problem, a cholesterol problem and excess abdominal fat, simultaneously, at fifty-two. And not one of them had ever been investigated.

He had been to doctors in that period. Nobody measured his waist. Nobody connected the complaint to the rest of his body — because that complaint has a prescription ready, and the appointment ends there.

What I did with him wasn't a prescription. I explained what was happening inside him, gave him specific exercises, and told him about two things he was sure had nothing to do with it: sleep and food. He came back twenty days later, and he had had sex with his partner.

An erection is a relaxation event

You picture the body pumping something up. It is closer to the opposite.

1. Arousal sends a nerve signal.

2. Nitric oxide is released — from nerve endings and, critically, from the endothelium lining the arteries.

3. Smooth muscle, which sits contracted by default, lets go.

4. Blood floods in and the spongy tissue expands.

5. The expanding tissue pinches the draining veins shut — which is what turns filling into staying hard.

6. An enzyme clears the messenger, and the whole thing reverses.

A garden hose makes this concrete. A new one is supple: open the tap and it swells, holds the stream, returns to shape. Leave the same hose in the sun for twenty summers and the rubber turns brittle — now the water runs weak, and it folds where it should swell. Nothing is blocking it. The wall stopped being able to give.

Arteries lose compliance the same way, and the narrowest one runs out of margin first.

Two things follow from that, and they explain a great deal.

Adrenaline contracts exactly the muscle that has to relax. Watching yourself during sex, checking whether it will work, is not merely psychological — it produces physical vasoconstriction.

Everything hinges on the endothelium. Damage it and the signal comes out weak, no matter how much desire is there, and no matter what the testosterone reads.

And now you know what the pills do. They block the enzyme that clears the messenger. They do not create the signal — they stop it being cleared. Which is exactly why they work well at first and fade over the years. That is not tolerance. There is less signal left to preserve.

What you get

The First Artery — an app you open on your phone tonight.

• The ebook, fifteen chapters. From staging yourself to maintenance — including a full chapter on the vacuum device, how to use it correctly and how to buy one that will not injure you.
• Seven video lessons. One per pillar, plus one on the two tools that give function back while the rest happens.
• The FAQ, twenty-one questions — including the one about the portable shockwave devices being advertised.
• The five-test list, printable, to hand to your doctor.
• The 180-day calendar, day by day, so nothing is left to decide.

Four bonuses, in every option

I am not going to tell you what these would cost separately. You have seen that inflated number on enough pages to know it is made up.

Three ways in

A consultation with me costs more than this. A month of pills costs more than this, and you pay it every month, indefinitely.

Before you decide