An interpersonal relationship is an association between two or more people that may range from fleeting [dubious - discuss] to enduring. This association may be based on inference, love, solidarity, regular business interactions, or some other type of social commitment. Interpersonal relationships are formed in the context of social, cultural and other influences.
The context can vary from family or kinship relations, friendship, marriage, relations with associates, work, clubs, neighborhoods, and places of worship. They may be regulated by law, custom, or mutual agreement, and are the basis of social groups and society as a whole.
A relationship is normally viewed as a connection between individuals, such as a romantic or intimate relationship, or a parent - child relationship. Individuals can also have relationships with groups of people, such as the relation between a pastor and his congregation, an uncle and a family, or a mayor and a town.
Finally, groups or even nations may have relations with each other, though this is a much broader domain than that covered under the topic of interpersonal relationships.
An intimate relationship is a particularly strong and close interpersonal relationship that involves physical or emotional intimacy. Physical intimacy is characterized by romantic or passionate sex and attachment, or sexual activity. The term is also sometimes used euphemistically for a sexual relationship. Intimate relationships play a central role in the overall human experience.
 Humans have a general desire to belong and to love which is usually satisfied within an intimate relationship.
 Intimate relationships involve the physical and sexual attraction by one person to another, liking and loving, romantic feelings and sexual relationships, as well as the seeking of a mate and emotional and personal support of each other.
An ethical relationship, in most theories of ethics that employ the term, is a basic and trustworthy relationship that one has to another human being, that cannot necessarily be characterized in terms of any abstraction other than trust and common protection of each other's body. Honesty is very often a major focus.