When you go to every Indian grocer within a 20 mile radius looking for cheap alum blocks and Godrej or Dettol creams, and the clerks advise you that the Indian guys like the American brands........so you put in special orders.
You have enough extra gear that you can pack fully pack shaving stuff two weeks in advance, and still continue to shave daily.The first thing you pack for a trip is your shaving kit (two weeks in advance)
...When, instead of merely having B&B as a bookmark on your browser, you have a batch file on your desktop that'll open all relevant forums and sub-forums on your browser with a single click
When the owner of the antique shop tells you it's a very rare 1930s razor, worth at least £30, and with barely a glance at the object in question you reply that it's a 1960s Gillette Tech, millions of which were made.