This thread is beyond depressing.
Men are like children? Then why do we leave them to run almost all the governments, armed forces, religions and large corporations of the world?
The husband didn't just fart loudly. He farted loudly, and told his wife that he would do as he liked in his own home. He was explicit that he was doing it to upset her, and show his dominance, almost literally pissing on his territory.
And as for doing it on the first date, etc. That's not the way it works is it? Of course she wouldn't have given him the time of day.
He has started doing it recently, because HE CAN.
Still, as others have pointed out, she can ask him to stop, which she has done, unsuccessfully, or live with it, or leave. (Or even just threaten to leave, but be prepared to carry it through.)
OP, I would suggest you post a new thread in Relationships. Give the whole story in your OP, and you will get very good support.