Why pockets became the prize
Your dog is not being rude in any deliberate sense; he has simply solved a puzzle. At some point a visitor reached into a coat, produced something tasty, and handed it over while he was pushing his nose into the fabric. From his side of the lesson, pockets predict food and persistence pays. Every guest who laughs, digs around, and eventually gives in strengthens the habit, because the reward arrives after the mugging rather than before it. Dogs who greet this way have often also learned that visitors mean excitement in general, so arousal is already high before the first nose touches a seam. Separating those two lessons matters: you need to lower the doorway excitement and, at the same time, move the source of treats from the guest's clothing to you.
Set the doorway up before anyone knocks
Start by briefing the humans, because your dog cannot out-train inconsistent guests. Ask visitors to arrive with empty pockets, keep hands still, and ignore him completely until you say otherwise; a guest who turns slightly sideways and folds their arms removes both the pocket target and the eye contact that fuels jumping. Put a defined station in the hall: a mat or rug a little back from the door gives him a job with edges, instead of free access to whoever walks in. Keep his lead and a pot of his normal treats by the door on your side of the arrangement, so reinforcement comes from the resident, never from the person being greeted. If callers are unexpected, use a baby gate or a lead clipped on before opening up rather than letting rehearsed chaos happen by surprise.
Rehearse the new greeting in stages
Practise first with a household member playing visitor, because a scripted helper will not panic-feed him. As the helper steps in, cue the mat, mark the moment he settles on it, and pay him from your pot while the helper stays dull and still. Repeat until he glances at the visitor, then back at you, expecting his reward where it now belongs. Next, let the helper walk past him to a chair while he holds the mat, paying in small instalments for staying put. Only then add a real guest, briefed in advance, and keep the first greetings short: the visitor says hello to the humans first, and any calm, four-paws-down approach from your dog is acknowledged briefly and ended before excitement rebuilds. If he breaks to mug a pocket, the guest turns away, you quietly return him to the mat, and the next rep gets easier, with more distance or a lead back on.
What to watch while the habit fades
Expect an extinction burst: a dog who has always eventually been paid may nose harder for a few visits before concluding the machine is switched off, and those are precisely the visits where nobody must cave. Watch also for the dog who redirects frustration into jumping or barking once pockets stop working; shortening greetings and paying the mat behaviour more generously usually absorbs that spillover. Children and elderly visitors deserve extra management, so use the gate for them until the new routine is boringly reliable. If the nosing ever comes with growling when a hand moves toward a pocket, that is guarding rather than enthusiasm, and a qualified behaviour professional should see him. Once the doorway runs calmly for weeks, fade your treat pot to occasional jackpots and let a quiet stroke from the guest become part of the reward itself. Keep the guest rules and each practice session assigned in KinsLe's Care Teams, where a completed doorway rehearsal is timestamped and the next person on duty can see exactly which stage he has reached.