The two pups in the video below were in the middle of a sibling argument, when Lacie, the younger dog, decided to play dirty in order to win the fight. Probably running out of arguments, the pup decided to go with a different approach in order to shut her brother up. Lacie turned around and shamelessly put her tiny puppy butt in Mac’s face. To make things even funnier, the person who was filming made some noises and managed to surprises Mac. His dramatic reaction as he hears the strange noises is just priceless. Take a look: