Interpersonal attraction

thumb|upright|A heterosexuality symbol

Oxytocin is a peptide hormone and neuropeptide normally produced in the hypothalamus and released by the posterior pituitary. Present in animals since early stages of evolution, in humans it plays roles in behavior that include social bonding, love, reproduction, childbirth, and the period after childbirth. Oxytocin is released into the bloodstream as a hormone in response to sexual activity and during childbirth. It is also available in pharmaceutical form. In either form, oxytocin stimulates uterine contractions to speed up the process of childbirth.

thumb|Romeo and Juliet, by [[Frank Dicksee, considered to be the archetypal romantic couple, depicting the play's iconic balcony scene]]

degree to which a person's physical traits are considered aesthetically pleasing or beautiful

psychological theory by Robert Sternberg

sexual, romantic, queer- & platonic, sensual and another attraction to women/femininity or men/masculinity

Simp () is an internet slang term describing someone who exhibits excessive sympathy and attention toward another person, typically to someone who does not reciprocate the same feelings, in pursuit of affection or a sexual relationship. This behavior, recognized as simping, is directed towards a variety of targets, including celebrities, politicians, e-girls, and e-boys. The term had sporadic usage until gaining popularity on social media in 2019.

the attraction between people which leads to friendships and romantic relationships

acts of physical intimacy in the view of others

Deference (also called submission or passivity) is the condition of submitting to the espoused, legitimate influence of one's superior or superiors. Deference implies a yielding or submitting to the judgment of a recognized superior, out of respect or reverence. Deference has been studied extensively by political scientists, sociologists, and psychologists.

theory; chemical substances (oxytocin) are studied in the context of their roles in producing human experiences and behaviors that are associated with love

Dependence of public acceptance of a person's mistakes on that person's ability

aesthetic preferences in Korean culture

socially constructed norm relating to male body image

psychological complex

stereotype