Maybe your friend isn't entirely familiar with what it is you're vaping and is confusing things with nic salt shots(nic salts you add to shortfills). The industry isn't helping on that front, you have nic salt (ready to go) ejuices with flavours and nic salt shots (just nicotine) for adding to shortfills, which mostly is just called nic salts in either case (understandably confusing).