The cooking fart
Fish, bacon, or anything with onions will help mask any scent. If you’re having your partner over for dinner, choose one of those items, or something else with an aroma sure to permeate your home for a while. It will confuse scents, and no one will know whether that smell is gas or food -- or both. Not to mention, your significant other will be so charmed you made dinner that they won’t even notice that the pungent smell may be laced with a dose of ass.
The trapped fart
The trapped fart is the riskiest of them all, and should be used sparingly. It’s useful for car rides when you have no other choice (and lowering the window would be suspect), or for when you’re cuddling on the couch and would rather not kill the vibe. (Be aware, however, that farting will kill the vibe far worse than getting up to go to the bathroom will.)
I recommend practicing this one alone a few times before you try it in the wild. It doesn’t always work, mostly because it requires some dextrous finagling with your butt cheeks to seal the fart beneath you. To do so, sit up straight, press your ass, hard, to your seat, and bring your legs together. You want to aim the fart slightly in front of you so it won’t escape out the back.