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There was a man I slept with, for a while, who could do something I had never felt a man do before.
Mid-stroke — not at the beginning, not at the end, but somewhere in the middle of an entirely normal rhythm — i would feel him get noticeably harder. Not in a slow, gradual way. In a distinct, almost startling way. As if some small switch had been thrown.
It took me weeks to ask him what he was doing.
When he finally explained — slightly embarrassed, the way men get when explaining their own pelvic floor — what he was doing was a small, specific, internal muscle squeeze. Five seconds. At the moment of peak arousal. Held.
The result, from the inside, was unmistakable.
And the result, from his side, was that he stayed harder, longer, and more reliably than any man I had been with in years.
He had not been on pills. He had not been doing any supplement protocol. He had not been working out in a way that targeted erection quality. He had been doing one specific move, in the middle of sex, that nobody had ever taught me to expect.
I’m calling it the flex.
Why Most Erection Advice Misses This Completely
Almost every article on harder erections gives you the same list of long-term suggestions. Lose weight. Cut alcohol. Sleep more. Take this supplement. Do generic kegels.
All of it might help, eventually, in the way “eat more vegetables” might eventually improve your skin. None of it does anything for you in the middle of the sex you’re trying to have tonight.
What you actually need is a move you can deploy in the moment. A switch you can flip while inside her.
That switch exists.
It is a specific muscle — the bulbocavernosus, or BC — that wraps around the base of the penis and, when contracted, traps blood inside the erectile tissue. Generic kegels engage this muscle, but not in a way most men can isolate or use deliberately.
Learning to find it, isolate it, and contract it on command — for five seconds, at the moment of peak arousal — is the closest thing male anatomy has to a hardness dial.
When you flex it, the erection gets harder. Visibly. Tangibly. To her, unmistakably.
And the men who know about this can deploy it, repeatedly, during sex. Most men have never been told this muscle exists by name.
How to Find the BC Muscle
Before you can use the flex, you have to find it.
The BC muscle is the one you would use to stop yourself peeing mid-stream. (Not the same one you would use to stop yourself farting — that’s a different muscle, and confusing the two is the reason most kegel advice doesn’t produce results.)
Try it next time you pee. Mid-stream, cut it off, then release. The muscle that did the cutting is your BC.
Now, while not peeing, contract that same muscle. You should feel a small lift at the base of your penis — almost like it’s being pulled up toward your body.
That sensation is the flex.
Practice it twenty or thirty times a day, in any setting. At your desk. In the car. Waiting for coffee. The point is to be able to find and engage the muscle without thinking about it, the same way you find any other muscle once you’ve practised.
I walk you through the isolation exercise — with anatomical diagrams — inside Soft To Steel.
How to Use the Flex During Sex
Once you can engage the BC reliably on command, here is the deployment.
1. Get to a moment of peak arousal.
Mid-stroke. Mid-encounter. A moment where the sensation is high and you can feel her response building.
2. Flex.
Contract the BC muscle. Firmly. Hold for five seconds.
3. Release slowly.
Not a sudden release. Let the muscle relax over two or three seconds.
4. Repeat at the next peak moment.
You can do this every thirty to sixty seconds during sex. Each contraction pumps more blood into the erectile tissue and traps it there. The cumulative effect, across an encounter, is a meaningfully harder, more reliable erection than your baseline.
5. Use it at the transition.
The moment between positions, or between foreplay and penetration, is the moment most erections soften. A five-second flex during the transition keeps the erection through the change.
Every variation is demonstrated inside Soft To Steel.
What She Will Feel
From the inside, the flex feels distinct.
She will feel you get harder. Almost immediately. Sometimes she will say something — sometimes she will not, because she will not know how to describe what she’s just felt, since no one ever told her this was a thing men could do.
She will, almost certainly, ask you about it later.
And the answer — that you have a small, specific muscle you have learned to flex on command — is the kind of answer that makes a woman, in some quiet way, take a different note about the man she is sleeping with.
Click here to start Soft To Steel and learn the flex.
Hot kisses,
Gabrielle Moore
Sex Expert & Author of Naked U
