• Marriage - Formalized consensual and contractual relationships between individuals
  • Romantic Love - Emotional and sexual relationships between men and women
  • Sexual Pleasure - Sensual gratification from sexual activities

Reference

Interpersonal relationship - Wikipedia, the free encyclopedia
"Interpersonal relationships are social associations, connections, or affiliations between two or more people. They vary in differing levels of intimacy and sharing, implying the discovery or establishment of common ground, and may be centered around something(s) shared in common. The study of relationships is of concern to sociology, psychology and anthropology. ..."