Rendered in pastel and charcoal on paper, the drawings also range from isolated portraits to lavish dreamscapes, populated with Renaissance putti and flowers. Surprisingly, art history and religious art are also touchstones. In the US, chimpanzees are still kept in laboratories for research, and lawyers are fighting court cases to grant these, and other apes, the status of legal person so they can be released into near-natural conditions. In another piece, Weissman appears alone in a mug shot format, suggesting his own feelings of guilt and transgression. Although she displays herself to us shamelessly, she nearly always returns our gaze. We know in an abstract way that all of us — people, apes, animals — are related. There is something eerie about meeting a gorilla raised as a human. Koko asked each of us to display first our nails, then our teeth. These works raise questions about bestiality, certainly, and taboo desires in general, but they also probe more existential questions about the line between human and animal. Koko is very interested in dental work and, coming from California, seldom encounters anything as basic as our UK fillings. Fredrik Nilsen A couple years ago, Benjamin Weissman had a disturbing sex dream about a gorilla. Desire is a complicated thing. Koko the gorilla uses sign language while playing with kittens — video I heard about Koko nine years ago and became fascinated.