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In [[evolutionary psychology]], people often speak of the '''four Fs''' which are said to be the four basic and most primal drives ([[motivation]]s or [[instincts]]) that [[animal]]s (including humans) are [[evolutionarily]] [[adapted]] to have, follow, and achieve: [[fight-or-flight response|''fighting'', ''fleeing'']], [[eating|''feeding'']] and [[reproduction|''
The list of the four activities appears to have been first introduced in the late 1950s and early 1960s in articles by psychologist [[Karl H. Pribram]], with the fourth entry in the list being known by terms such as "sex"<ref name="Pribram60">{{cite journal|title=A Review of Theory in Physiological Psychology|journal=[[Annual Review of Psychology]]|date=January 1960|volume=60|issue=1|pages=1–40|last=Pribram|first=Karl H.|author-link=Karl H. Pribram|doi=10.1146/annurev.ps.11.020160.000245|url=https://saltworks.stanford.edu/assets/sw906gh1421.pdf}}</ref>{{rp|11,13}} or "mating and maternal behavior",<ref name="Pribram58">{{cite book|last=Pribram|first=Karl H.|author-link=Karl H. Pribram|editor1-last=Roe|editor1-first=Anne|editor2-last=Simpson|editor2-first=George Gaylord|title=Behavior and Evolution|year=1958|publisher=Yale University Press|pages=140–164|chapter=Chapter 7: Comparative Neurology and the Evolution of Behavior|chapter-url=http://karlpribram.net/wp-content/uploads/pdf/theory/T-005.pdf}}</ref>{{rp|155}} although he himself did not use the term "four Fs".
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