Informal agreements between husband and wife made out of natural love and affection are known as:

Informal agreements between husband and wife made out of natural love and affection are commonly referred to as "verbal agreements" or "gentlemen's agreements." These types of agreements are not legally binding like formal contracts, but they can still hold significant emotional and relational weight between partners. They often arise from mutual understanding and trust, reflecting the couple's intentions and commitments to each other without the need for legal formalities.

In many cases, these agreements might cover aspects of daily life, responsibilities within the household, or even financial arrangements. While they may not have legal enforceability, they serve as a reflection of the couple's shared values and are intended to enhance their relationship. It is important to note that, in the context of legal disputes, such informal agreements may be harder to prove without written documentation or witnesses. Nevertheless, they play a crucial role in the dynamics of many marriages.