Chimpanzees use sex tools

May 05, 2010 by Lin Edwards report
Common chimpanzee in the Leipzig Zoo. Image credit: Thomas Lersch, via Wikipedia.

(PhysOrg.com) -- Many animals are known to use tools, but chimpanzees (our closest living relatives) show the most varied and complex use of tools, and the males in one group of chimps have even been observed using sex tools to attract a mate.

The definition of "" varies, but most scientists recognize objects as tools if they are inanimate objects outside the body of the user, if they are used to alter the environment in some way or to gain information about it, and if they are modified in some way in function, form or position. Chimpanzees were first observed using tools by Jane Goodall in 1960, when she documented chimps using blades of grass to extract termites, and chimps are now known to use a "tool kit" of around 20 tools, with the tools in the kit varying from one colony to another.

Researchers working in Tanzania have observed male chimpanzees plucking and breaking the dry, brittle leaves in front of their visible erection, and using the rasping sound to attract the attention of a female. If she is interested, the behavior is followed by mating. The use of leaves in this way has not been seen in other chimp groups, but chimps everywhere have been seen to use tools and combinations of tools in complex sequences to attain their goals, which may involve food, social rituals, or in this case, sexual desires.

In an essay in Science, primatologist and university lecturer in , Dr. William C. McGrew from the University of Cambridge, described the latest findings on tool use in . He said the leaves used by the Tanzanian chimps fit the definition of a tool because the chimps are using an external object to obtain a specific goal, which is to interest the female in mating.

Dr McGrew is the author of the book “The Cultured Chimpanzee: Reflections on Cultural ” and hundreds of scientific publications on non-human primates.

Explore further: New species of mayfly discovered in India

More information: William C. McGrew, Chimpanzee Technology, Science 30 April 2010: Vol. 328. no. 5978, pp. 579 - 580. DOI:10.1126/science.1187921

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User comments : 10

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otto1923
4.6 / 5 (8) May 05, 2010
Is that a banana in your pocket or are you just glad to see me?
lengould100
4.4 / 5 (7) May 05, 2010
Why are you crushing those hemp leaves that way?
avafeas
May 05, 2010
This comment has been removed by a moderator.
gunslingor1
1 / 5 (2) May 05, 2010
Why not show a picture? It would make if far more beleivable to skeptics.
MeLikesToThink
5 / 5 (1) May 05, 2010
I tried this with my cell phone the other day. She said, "Well, are you gonna decide? Or play with both of em?"
panorama
May 05, 2010
This comment has been removed by a moderator.
PieRSquare
May 05, 2010
This comment has been removed by a moderator.
sysin3
not rated yet May 05, 2010
If they could use a banana as a sex tool, now that would be impressive ;-)
fixer
not rated yet May 05, 2010
Good one Physorg, not science news but still funny!
Eric_B
not rated yet May 05, 2010
this is similar to what some creative homo sapiens do with a cell phone set to vibrate with voice calling.
zevkirsh
May 06, 2010
This comment has been removed by a moderator.
Eric_B
5 / 5 (2) May 06, 2010
how is this thing with the leaves any different than rustling a big wad of cash at the hip?!?
LuckyBrandon
1 / 5 (1) May 06, 2010
well, it beats nailing the chimpette over the head with a log and taking what you want...
It seems to me, in some ways, they are evolutionarily beyond our ancestor species...lol
Eric_B
1 / 5 (1) May 09, 2010
hmmm...i think the log-beating-caveman-rape imagery is probably a myth.