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Ask Sensei: The “Friendly” Co-worker Who Won’t Back Off
Published on October 25, 2025
Sensei,
My problem isn’t as dramatic as some, but it’s driving me crazy, and I feel like I’m the one being weird.
I started a new office job about three months ago. There’s a guy in my department, “Mark,” who has been there for years. He’s not my boss, but he’s senior to me. He has appointed himself my unofficial “mentor,” and he’s constantly in my space.
He’ll come over to my desk to “show me a shortcut” and instead of just telling me, he’ll lean way over me, with his hand on the back of my chair, and take my mouse. His face is inches from mine, and I can smell his coffee.
In the breakroom, he’ll stand right next to me at the counter, so our elbows are touching, to get to the sugar. Or if I’m in the hallway, he’ll “jokingly” walk right toward me until I’m the one who has to flatten against the wall to let him pass.
Every time it happens, I freeze. I feel this hot, prickly feeling, but I just give a nervous laugh or lean away. He’s always “just being helpful” or “just kidding.” I feel like I can’t say anything without sounding rude or “bitchy.” I definitely can’t go to HR—what would I even say? “He stands too close”?
I’m starting to dread seeing him and I take the long way to the bathroom to avoid his desk. Am I overreacting to a “touchy-feely” guy, or is this really as weird as it feels?
— Uncomfortable at Work
Sensei’s Response:
Uncomfortable,
That “hot, prickly feeling” you described? That is your intuition screaming at you. It is the exact same internal alarm system that tells someone to run in a dark garage. The threat here isn’t immediate physical violence, but the threat to your autonomy is just as real.
You are not overreacting. You are reacting perfectly to someone who is consistently, and likely deliberately, testing your boundaries.
This is a classic dominance ritual known as “creeping by inches.” Because each individual action is small and can be plausibly denied as “friendly” or “helpful,” it makes you feel like you are the problem if you object. This tactic relies entirely on your social conditioning—your fear of “making a scene” or being perceived as “difficult.” Mark is counting on you to be too polite to stop him.
Let’s be clear: You have a non-negotiable right to your personal space. His “help” is a pretext for invasion. It is time to teach him where your boundaries are. You do not have to be confrontational, but you must be clear. Your goal is to re-establish your workplace boundaries calmly and consistently.
1. Use Your Body as a Tool
When he comes to your desk, don’t just lean away—that signals submission. Pivot. Turn your entire chair to face him, breaking his “over-the-shoulder” access. If he reaches for your mouse, put your hand out to stop him and say, “I’ll drive, thanks. Just tell me the shortcut.” You are taking back physical control of your workspace.
2. Create Physical Barriers
If he leans on your chair back, pick up a notebook, a folder, or your water bottle as if you need it. This forces him to physically move back to accommodate your movement. In the breakroom, if he stands too close, take a clear, deliberate step to the side and turn to face him. This changes the dynamic from “side-by-side” (intimate) to “face-to-face” (transactional).
3. Use Your Voice (Calm and Bored)
Your tone is your weapon here. Do not be angry, and absolutely do not be apologetic. Be neutral, flat, and almost bored, as if you are stating a boring fact about the weather.
- As he leans in: “Whoa, Mark, you’re in my bubble.” (Said without a smile).
- When he blocks the hallway: Stop walking. Stand your ground. Say, “Excuse me, Mark,” and wait. Do not flatten yourself against the wall. Make him move around you.
This isn’t about one big showdown. It is about consistency. Every single time he tests the fence, he must find it electrified. He will learn very quickly that you are not the easy, polite target he thought you were.
Trust that prickly feeling. It’s not “weird.” It is your best-trained bodyguard.