its a *pygmy* chimpanzee i guess:
http://tolweb.org/tree?group=Pan&contgroup=Hominidae
bonobo = pan paniscus chimpanzee = pan troglodytes
and the common parent of the bonobo and the chimp is where the fork of humans happened, so perhaps i am wrong: the chimp and bonobo share an equal amount of their DNA with us.
otoh, the below:
http://www.zoo.nsw.gov.au/imagedata/Chimp.pdf
states "pan troglodytes is the closest living living relative".
but at this point i am probably splitting hairs.
http://www.arkive.org/species/GES/mammals/Pan_troglodytes/
(bonobo sexuality) http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10818623&dopt=Abstract
--ravi