Wait for the cutscene it's pretty funny. Also I know some of the farts are bad. I will tell you the good and bad ones. Good:22, 38, 40, and 41. Bad:5, 6, 7, 10, 11, 17, 18, 20, 34, 35, 39, 14, and 13. The rest are decent [there are 42 farts] Enjoy and annoy! Purple farts are "normal" Green farts are wet, red farts are parent farts, and brown farts are sharts :]
Btw, the lore is you are a mom, you go to your sons room and he keeps farting! At the end there's a cutscene and it's funny. And, imagine you are on the toilet or farting and that will help. Jesus Loves You!