Because why not, that's why
Sometimes things are so obvious, you wonder why they didn't happen sooner. This is one of those times.
Some enterprising Internet user saw the ass-heavy video for "Anaconda" by Nicki Minaj, and thought, "Hmm. Good, but not enough fart noises. I can fix this!" And fix it they did, with the below video. Every shot of Minaj's butt --and, I mean, there are a lot -- is now accompanied by super-loud fart noises. When Minaj shakes her butt early in the video? Fart noises. When her dancers start to shake? Fart sounds. When Drake suddenly appears? Nothing but farts.
See for yourself below.