Grounds for divorce are open. The list is not exhaustive. It is an actionable tort to refer to a person's private parts in public. This is aggravated if the words are uttered in the presence of the offended person's relatives or the opposite sex. Insults are prohibited because they are potentially disruptive of the social order.
Divorce leads to other issues.
The courts now address the question of maintenance. The past practice was for the court to order a distribution of domestic property. But they have now gone a step further. An order for a lump sum or periodic maintenance is made. This appears to be an innovation in response to the pressures of urban culture.