Editing Homosexual behavior in animals (section)

====Sheep====
{{main|Homosexual behavior in sheep}}
''[[Ovis aries]],'' the common domesticated sheep, has attracted much attention due to the fact that around 8–10% of rams have an exclusive homosexual orientation.{{refn|<ref name="Poiani2010"/><ref name="The Volume of a Sexually Dimorphic"/><ref>{{cite journal | vauthors = Roselli CE, Stormshak F | title = The neurobiology of sexual partner preferences in rams | journal = Hormones and Behavior | volume = 55 | issue = 5 | pages = 611–20 | date = May 2009 | pmid = 19446078 | pmc = 2684522 | doi = 10.1016/j.yhbeh.2009.03.013 }}</ref><ref name="ncbi.nlm.nih.gov">{{cite journal | vauthors = Roselli CE, Stormshak F | title = Prenatal programming of sexual partner preference: the ram model | journal = Journal of Neuroendocrinology | volume = 21 | issue = 4 | pages = 359–64 | date = March 2009 | pmid = 19207819 | pmc = 2668810 | doi = 10.1111/j.1365-2826.2009.01828.x }}</ref><ref>{{cite journal | vauthors = Perkins A, Fitzgerald JA, Price EO | title = Luteinizing hormone and testosterone response of sexually active and inactive rams | journal = Journal of Animal Science | volume = 70 | issue = 7 | pages = 2086–93 | date = July 1992 | pmid = 1644682 | doi = 10.2527/1992.7072086x | url = https://www.animalsciencepublications.org/publications/jas/articles/70/7/2086 | access-date = 2015-07-07 | archive-url = https://web.archive.org/web/20170630082018/https://www.animalsciencepublications.org/publications/jas/articles/70/7/2086 | archive-date = 2017-06-30 | url-status=dead | url-access = subscription }}</ref><ref name="Rosellietal2004">{{cite journal | vauthors = Roselli CE, Larkin K, Schrunk JM, Stormshak F | title = Sexual partner preference, hypothalamic morphology and aromatase in rams | journal = Physiology & Behavior | volume = 83 | issue = 2 | pages = 233–45 | date = November 2004 | pmid = 15488542 | doi = 10.1016/j.physbeh.2004.08.017 | s2cid = 156571 }}</ref>}} Such rams prefer to court and mount other rams only, even in the presence of estrous ewes.<ref name="Poiani2010"/> Moreover, around 18–22% of rams are bisexual.<ref name="ncbi.nlm.nih.gov"/>

Several observations indicate that male–male sexual preference in rams is sexually motivated. Rams routinely perform the same courtship behaviors (including foreleg kicks, nudges, vocalizations, anogenital sniffs and [[flehmen response|flehmen]]) prior to mounting other males as observed when other rams court and mount estrous females. Furthermore, pelvic thrusting and ejaculation often accompany same-sex mounts by rams.<ref name="Rosellietal2004"/>