Overheard at the LFGSS golf club bar

ffs people.

the point is clearly where 'my' is used to imply you have an regular and ongoing need for a person to provide a service that for others is a very rare or one-off transaction, or that your needs can only be met by a specific individual, where others' needs can be met by a generic service from a company.

... as a subtle 'flex' as the kids say.

'my bike fitter' is a classic example, as it also implies:

• you have not only multiple bikes, but buy them regularly, and expect to do so again shortly
  
• your specific needs cannot be met by the standard level of fit checking when buying a bike
  
• you would rather spend £400 again than simply replicate a few measurements from your previous purchase