Majikthise suggests that if you have female vervets, even a real car (see photo) would be a mistake.
Sex differences in response to children's toys in nonhuman primates (Cercopithecus aethiops sabaeus)
Author(s): Alexander GM, Hines M
Source: EVOLUTION AND HUMAN BEHAVIOR 23 (6): 467-479 NOV 2002
"Sex differences in children's toy preferences are thought by many to
arise from gender socialization....In this study,
we found that vervet monkeys ...show sex
differences in toy preferences similar to those documented previously
in children. The percent of contact time with toys typically preferred
by boys (a car and a ball) was greater in male vervets (n=33) than in
female vervets (n=30) (P<.05), whereas the percent of contact time
with toys typically preferred by girls (a doll and a pot) was greater
in female vervets than in male vervets (P<.01)....The results
suggest that sexually differentiated object preferences arose early in
human evolution, prior to the emergence of a distinct hominid lineage."
From idiolect.org via Majikthise
