I'm going to interrupt my girlfriends nephew during his story time with literal fart montages
Oh that would make everyone laugh, wouldn't it?
I don't want the boy to grow up without a sense of humor.
Well, bathroom humor is funny for small kids, he might be entertained. But for the most part I suggest to hold it in somewhat so nothing is overly done too.
Life is hard enough, I can't walk around suffering from stomach aches.
I'm sorry you're having a lot of gastrointestinal distress. Your nephew might only think of you as the farting man, and you wouldn't want that label forever, right? So remember moderation is key.