I smell my boogers
Ok, why do you smell them?
I get paid to be good at it.
I don't understand how you get paid to smell your boogers, that remains a mystery. This isn't something that you want to do around others though as people will find that disturbing.
Do you really think people will think it is gross?
As long as you do this in the privacy of your bathroom, you should be fine. However, this is something that will make other people uncomfortable to witness.