Editing Open marriage (section)

===Psychological basis===
The preference for a polyamorous versus a swinging style of open marriage may depend on many psychological factors. One factor may be [[Sociosexual orientation|sociosexuality]],<ref name="Ostovich, Sabini, 2004">Ostovich, J.M., & Sabini, J. (2004). How are sociosexuality, sex drive, and lifetime number of sexual partners related? [[Personality and Social Psychology Bulletin]], 30, pp. 1255–1266.</ref> an individual's willingness to engage in sexual behavior without having emotional ties to the sex partner. Individuals who are very willing to engage in sexual behavior without emotional ties are said to have ''unrestricted sociosexuality''. Individuals who are very unwilling to engage in sexual behavior without emotional ties are said to have ''restricted sociosexuality''. Individuals can vary along a continuum from unrestricted to restricted sociosexuality.