Everything has +/- calories. Even the air you breath.
Took a minute for the doc to splain but respiration is a metabolic process. Metabolic processes require (burn) calories.
...it's a slow day, just thought I'd throw that out there to catfish
True, but products being labeled as "0" calorie for a ridiculously small serving size can be misleading and detrimental depending on your goals.
I'm not saying that lubing up a skillet of eggs with pam is going to be the difference in morbid obesity and fitness, but it's definitely something to keep in mind if you're staying conscious of calorie intake.
Personally, if I'm cutting calories (like after gaining weight during the holidays), I stick with my butter and oil, and just cut down on other things instead, usually sugary drinks, simple carbohydrates, and that sort of thing.