Many people understand that the other party in the relationship farts in their presence and there are others who neither understand nor endure it, even if they do. For some people, that their partner prefers to explode before releasing their gases accompanied, not only necessary but healthy, is an undeniable lack of trust.
For others, it is an unnecessary lack of respect and they would always expel their flatulence in an intimate place and trying that neither the sound nor its aroma reach the ears or noses of the one they love. Doing so could be a good gauge of the couple's state of openness and intimacy.