This page looks at interesting research that reveals aspects of human pair bonding.
Incidentally, there is no theoretical reason to assume that the processes behind pair-bonding would differ across sexual orientations.
The Myth of the Philandering Man and the Crafty Woman
A Historical-Genetic Reconstruction of Human Extra-Pair Paternity
Beyond Satisfaction: The Role of Attachment in Marital Functioning
The Ape That Thought It Was a Peacock
Money, Sex and Happiness: An Empirical Study
Young men and women’s implicit attitudes towards consensually nonmonogamous relationships
Life history correlates of human (Homo sapiens) ejaculate quality
An Ethological Study of Camgirls: Plentiful, Sexually Available Virtual Women For Hire
Mate Preferences and Their Behavioral Manifestations
Does a Long-Term Relationship Kill Romantic Love?
A Descriptive Analysis of Sexual Problems in Long-Term Heterosexual Relationships
Rituals and Nuptials: Relationship Rituals Predict Relationship Satisfaction
Sexual motivation and the duration of partnership
Attachment
The Experimental Generation of Interpersonal Closeness: A Procedure and Some Preliminary Findings