Orange and Cinnamon Tequila Shot

1 slice orange, seeds removed

1 pinch ground cinnamon, or more to taste

1 (1.5 fluid ounce) jigger tequila

Place orange slice between forefinger and thumb of left hand. Lick the skin just below thumb of left hand and sprinkle with a pinch of cinnamon. Place shot of tequila in right hand. Lick cinnamon, drink shot, and bite orange slice.