How do i get my Girlfriend not to fart around me?

Now dont get me wrong. Girls fart its a fact and im not saying i dont want her to stop for ever (impossible) but what i am saying is when she farts around me, i kind of get a little disgusted and find myself slightly turned off. When she first farted we were dating for only about a month, no problem.. but it was incredibly loud and unnessessary i thought to myself. Not very girly like... ive brought this to her attention before and even agreed not to fart around her if she doesnt around me... that didnt work cause i completely forgot and she called me on it. is there a better way to deal with this.. like just somehow learn to accept it? cause there isnt much i can do.. i respect her too much to make any aspect of our relationship unfair, since i believe in equality in a relationship. also its not like a purposefull thing and she doesnt laugh about it.. just picture her watching tv with me then raising a cheek farting and continueing on like nothing happend.