যৌনসঙ্গম: সংশোধিত সংস্করণের মধ্যে পার্থক্য

*{{cite journal |vauthors=Bailey NW, Zuk M | title = Same-sex sexual behavior and evolution | journal = Trends Ecol. Evol. | volume = 24 | issue = 8 | pages = 439–46 | date = August 2009 | pmid = 19539396 | doi = 10.1016/j.tree.2009.03.014 }}</ref> Like humans engaging in sexual activity primarily for pleasure,<ref name="Diamond">{{Cite book|last=Diamond|first=Jared|authorlink = Jared Diamond| title = The Rise and Fall of the Third Chimpanzee| year = 1991 | publisher = Radius | pages = 360 pages<!-- Various pages in the book discuss all of these matters.-->|isbn = 0091742684|url=https://books.google.com/books?id=PQVFAQAAIAAJ|accessdate=October 21, 2015}}</ref> this behavior in the aforementioned animals is also presumed to be for pleasure,<ref name="Balcombe">{{Cite book|last=Balcombe|first=Jonathan|authorlink= Jonathan Balcombe | title = Pleasurable Kingdom: Animals and the Nature of Feeling Good| year = 2006 |publisher = [[Palgrave Macmillan]] |pages= 106–118 | isbn = 0230552277|url=https://books.google.com/books?id=MyKox3YXI1kC&pg=PA106|accessdate=October 21, 2015}}</ref> and a contributing factor to strengthening their social bonds.<ref name="Diamond"/>