Hey man it is simple.......THE MORE YOU SMOKE THE MORE YOU CAN SPOT PEOPLE WHO ARE STONERS AND YOU ESPECIALLY NTOTICE WHEN OTHERS ARE HIGH OR THEY ARE JUST ACTUALLY SMOKIN......I NEVER NOTCIECED AS MANY POEPL SMOKEING WEED AND DRIVEINNG or something as i do these days. holy shit it's everywhere and nowhere all at the same time good luck....