These are the most frequently used words in this book.
1991
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adaptation
aesthetic
al
appear
art
attractive
attractiveness
beautiful
beauty
behavior
between
body
brain
certain
choice
culture
design
different
during
eds
effects
environment
epc
et
even
evidence
evolution
evolutionary
experience
faces
facial
features
female
fig
first
form
found
function
good
habitat
high
however
human
idea
individual
information
landscape
male
mate
may
men
might
natural
nature
new
partner
patterns
perception
physical
pp
preferences
press
process
psychol
quality
recognition
research
result
see
selection
sex
sexual
signal
social
studies
symmetry
system
theory
thornhill
thus
time
tion
traits
university
value
view
visual
women
world
york