Homosexual orientation in males: evolutionary and ethological aspects. Muscarella F, Fink B, Grammer K, Kirk-Smith M. Journal Article 2001; 22(6): 393-400 PubMed PMID: 11781535 Keywords: Adaptation, Physiological, Biological Evolution, Brain:physiology, Culture, Homosexuality, Male:ethnology, Humans, Male, Neurosecretory Systems:physiology,. Citation : Evolutionary theory proposes that adaptive traits are reproduced more successfully than maladaptive traits. Accordingly, natural selecti..... Read abstract