The amount of psychological satisfaction an oral slave receives while orally pleasuring his female partner cannot be overstated. It is as though time stops and his only focus is her pleasure.
It started out as a very nice scene (something I personally enjoy doing with my husband after a long day at work), but I must admit farting in your partner's face is really disrespectful and awful, even if it is staged. And it certainly shouldn't be like this in real life.