Is it normal to fart on your partner?
Depends.It depends
Farting around your partner is normal; deliberately farting on them depends on whether you both find it funny. Some couples joke about it, while others find it gross or disrespectful.
Passing gas is a normal body thing, and plenty of couples get comfortable enough to do it around each other. But aiming one at your partner is a different story: some people think it’s hilarious, and some really don’t want to be part of the bit.
It mostly comes down to your shared sense of humor and boundaries. If your partner laughs too, fine; if they’ve asked you to stop, take them at their word rather than treating it as a romance test.