Have experienced 3 recent Body Odour issues that have me questioning the hygiene of the average traveller.
Jan 2: London-Cape Town (BA) on an evening flight - unfortunately stuck in the middle seat of three with the aisle seat occupied by a large man - my wife and 2 kids were in the 3 seats directly behind. The odour eminating from the gentleman in question was so disgusting (i'm not just talking underarm odour here! :shock

that I quietly requested a seat change - luckily there was a spare seat a few rows behind.
Feb 17: Syd-Hob (Virgin) on a 6.30am - I had the window seat and the large (not overweight, just big!) gentleman in the middle of three obviously had not seen a shower inteh previous 24 hours - he also seemed to think that it was ok to turn his back slightly towards me (he had long legs) and lean into my 'space' rather than sit facing forward - a polite 'excuse me, I think you're leaning into my seat' and the air vent soon fixed him.
Mar 4: Per-Syd (QF) on the red-eye - I had the window seat (1 of 2) on a new airbus - unfortnautely the large young man (again, just a big bloke) next two me must have had a tough day and the 'pits were giving off an unpleasant odour - a well directed air vent sorted him out.
While the family think it's hilarious

and I can understand the humour in teh situation, I'm wondering if I have a sign on my back welcoming smelly passengers to select a seat alongside me....am not looking forward to my Syd-Hob flight next week.
Any similar stories or advice?!