You are in the shower, and you are winning an argument with someone who isn't there. You have the perfect opening line. They interrupt, and you have the perfect reply. Your voice stays steady, your logic is airtight, and the other person finally, quietly, understands. Then the water goes cold, you step out, and the real conversation is still three days away. Your heart is already racing.

Almost everyone does this, and almost no one admits it. We treat it as a quirk, or as proof that we're anxious or controlling or can't let things go. The research suggests something more interesting. The habit is not a malfunction. It's a tool. Like most tools, it can build something or it can hurt you, depending on how you hold it.

The mind is a rehearsal room

Communication researcher James Honeycutt has spent decades studying what he calls imagined interactions: the mental simulations in which we picture a conversation with another person, often playing both parts. His work suggests this is ordinary and widespread, and that it serves several distinct purposes. We use it to prepare for something we're about to say, to make sense of something that already happened, to vent feelings we can't safely voice, and to stay close to people who aren't in the room.

The underlying machinery is older than the shower fantasy. Human brains are built to simulate. Before we act, we run a rough model of what might happen. We do it with a job interview, a tricky merge on the highway, and a first date. A conversation that matters to you is simply the most emotionally loaded thing you can simulate, because the stakes are other people's opinions of you.

So the first reframe is a kind one. When you rehearse a hard conversation, you aren't being neurotic. You're doing what a brain is for. The question isn't whether to simulate. It's what kind of simulation you're running.

When rehearsal helps

Used well, mental rehearsal does real work. Thinking through what you want to say can clarify what you actually feel, which is often not what you assumed. Planning in advance can also make it easier to follow through. Peter Gollwitzer's research on implementation intentions, plans shaped like "if this happens, then I will do that," shows that specific if-then plans make people more likely to act on their goals than good intentions alone. Picturing the moment and deciding your move ahead of time is a well-supported way to get yourself to do the hard thing.

Imagined interactions can also take the edge off. Honeycutt and colleagues have described how simulated conversations can work as a kind of release valve, letting you say the angry thing in private so it doesn't come out sideways later. In the right dose, you walk into the real conversation a little clearer and a little calmer.

The signature of helpful rehearsal is that it moves. It ends somewhere. You land on a sentence you'd actually be willing to say, and the tension in your chest drops, even slightly.

When rehearsal becomes a trap

Now the other side. Some rehearsals don't prepare you for anything. They just replay.

The pattern is recognizable. The imagined conversation starts the same way every time. The other person is more defensive, colder, or crueler than they've ever really been. You get angrier with each pass, and the scene never resolves. You finish the loop more activated than when you began.

Two things are happening here. First, the research on imagined interactions points to a difference in quality. Simulations that are more negative and more repetitive tend to go along with more distress, while ones that are constructive and varied tend not to. That fits what we know about rumination in general: repetitive thinking that focuses on the problem rather than the next step tends to deepen low mood and anxiety rather than relieve it.

Second, your simulation is biased by your mood. When you're upset, the other person you build in your head is assembled from your fear and your worst memories of them. You're not rehearsing with the real person. You're rehearsing with a villain you drafted at 2 a.m. And because your body can't fully tell a vivid imagined threat from a real one, each run of the scene can set off a small stress response. Your heart rate climbs for a conversation that hasn't happened and might never go that way.

There's a quiet cost too. Heavily scripted conversations leave little room for the actual human on the other end. If you've written their lines, you may not hear what they really say.

The test: is it a plan or a loop?

You don't need to stop rehearsing. You need to tell the two modes apart, and you can do it with a few questions.

  • Does it end? A plan reaches a conclusion. A loop restarts.
  • Does the other person ever surprise you? In a plan, you allow for several responses. In a loop, they only ever say the worst thing.
  • How does your body feel afterward? Clearer is a plan. Tighter is a loop.
  • Is there a next action? A plan produces something you can do. A loop produces only a feeling.

If you notice you're in a loop, the goal isn't to scold yourself out of it. Trying to forcibly not think about something tends to backfire. It's better to redirect the simulation into something useful.

Your next moves

  • Write the one sentence. Before the conversation, put on paper a single sentence that states what you actually need or want to say, in plain words. Not the full speech, just the core. If the rehearsal keeps spinning, come back to that sentence.
  • Build one if-then plan. Pick the moment you're most dreading and decide your move in advance: "If they raise their voice, I'll say 'I want to keep talking, let's take five minutes,' and then I'll step outside." One specific plan beats ten replayed scenes.
  • Run the other version. Deliberately rehearse the scene where the person responds with confusion, or tiredness, or kindness. Real people are rarely the villain you built. Seeing two or three plausible responses loosens the grip of the single worst one.
  • Set a rehearsal limit. Give yourself ten minutes, once, with a timer, to think it through on paper. When the timer ends, the planning is done. Later urges to replay it get the answer, "I've already prepared."
  • Get the venting out of your head. If the scene is mostly anger you can't voice, write the unsent version in full, every harsh line. Then close the notebook and write a second, shorter version that you would be willing to actually say.

And remember what the rehearsal is for. It's not for winning. It's for walking into the real conversation steadier, curious about who's actually sitting across from you.

A place for the words before they're spoken

Part of why these loops grip us is that the words have nowhere to go. They sit in the head, circling, because saying them out loud feels too risky and not saying them feels like swallowing them. That's the space Aside was made for: a quiet place to put the thing down in writing, name what you're feeling, and see it on a page rather than on a loop. If you want somewhere to untangle the conversation before you have it, you can find Aside at aside.lumenlabs.works. Either way, the next time you catch yourself mid-argument in the shower, you'll know to ask whether you're planning or circling, and to choose the one that lets you step out of the water lighter.