In biology, a pair bond is the strong affinity that develops in some species between the males and females in a pair, potentially leading to breeding. Pair-bonding is a term coined in the 1940s that is frequently used in sociobiology and evolutionary psychology circles. The term often implies either a lifelong socially monogamous relationship or a stage of mating interaction in socially monogamous species. It is sometimes used in reference to human relationships.

Monogamous voles, such as prairie voles, have significantly greater density and distribution of vasopressin receptors in their brain when compared to polygamous voles. These differences are located in the ventral forebrain and the dopamine-mediated reward pathway.

Both vasopressin and dopamine act in this region to coordinate rewarding activities such as mating, and regulate selective affiliation. These species specific differences have shown to correlate with social behaviors, and in monogamous prairie voles are important for facilitation of pair bonding.

The word pair, derived via the French words pair/paire from the Latin par 'equal', can refer to:

Bond, bonds, bonded, and bonding may refer to:

Hamish Bond (born Dunedin, 13 February 1986) is a New Zealand Olympic rower.

Bond was a member of the gold medal-winning coxless fours at the 2007 World Rowing Championships. Prior to the 2008 Olympic Games in Beijing, Bond was officially named as New Zealand's 1000th Olympian but later corrected to 1002 after a miscount. He was a member of the Men's coxless four which won the B final at Beijing.

The following year, he and Eric Murray won the coxless pairs at the 2009 World Rowing Championships. Bond and Murray together won the team of the year award at the 2009 New Zealand Halberg sports awards.

Bond and Murray continued to row together in the coxless pairs and competed at the World Cup Series and at the World Rowing Championships in Karapiro, New Zealand 2010. They won all 4 of these international races. They won their 2nd world title together in front of a passionate home crowd. Bond describes racing in front of a home crowd as a "once in a lifetime experience". Bond and Murray have a long running rivalry with the British pair of Pete Reed and Andrew Triggs-Hodge. The British pair have won silver in 2009 and 2010.

Hannah Holmes (born 1963) is an American writer, journalist, essayist, and science commentator for Science Live (Discovery Channel) and radio shows such as Maine Things Considered. She has published four books, most recently Quirk: Brain Science Makes Sense of Your Peculiar Personality (Random House, 2011). She has published articles online and in magazines including Sierra, New York Times Magazine, L.A.Times Magazine, Outside, Islands, and Escape. She earned a B.A. from University of Southern Maine in 1988, and lives with her husband in Portland, Maine.