Most men who freeze up in bed assume their body has quit on them. It hasn't. It's doing exactly what it was built to do, just at the wrong time.
Chapter 2 of Performance: Unlocked walks through what's actually going on, and I'll give you the short version here.
Your brain isn't asking permission
When your brain decides something is risky, it shifts into threat mode without checking with you first. Heart rate goes up. Breathing gets shallower. Muscles tighten, especially in places you rarely think about. Your thinking narrows and starts looking forward, scanning for what could go wrong next.
All of that is useful if you're running from a car. It's a terrible setup for arousal, which needs the opposite signals: safety, ease, a body that's allowed to settle. Sexual response runs on the calm side of your nervous system. Threat mode runs on the other side. They don't cooperate well.
The chain reaction
A cue shows up. It might be your partner's reaction, the time passing, or a memory of the last bad night. Your brain flags it as a risk. The stress response kicks in. Your attention narrows to monitoring. Sensations get harder to trust, arousal gets less stable, and the outcome confirms the prediction. The next cue then lands harder.
From the inside, that doesn't feel like a chain. It feels like "I can't." One thing I try to do in the book is break that sentence apart, because "I can't" is usually your brain's label for a loop, not a statement about what your body is capable of.
Why this is good news
If the problem were that something is broken, you'd be stuck waiting for a repair. But a nervous system in threat mode is a state you can enter and exit, and states have triggers and patterns and timing. That means you can learn them.
The first skill is also the simplest. When you feel the freeze, ask what your threat mode feels like in your body. Tight chest, racing thoughts, numbness, a fast shutdown? Everyone has a signature. Knowing yours means you can spot it earlier next time.
One caution I repeat in the book: if you have persistent erection difficulties, pain, numbness, or big changes in sexual function, see a licensed clinician. Anxiety can play a large part, but it's not the only possible cause, and a doctor can rule things out.
Chapter 2 lays out the full mechanism in plain language, with no jargon to decode. You'll find Performance: Unlocked in my Shop, $39 and an instant download.