Not just for children anymore...
Koko has been involved in a number of sexual harassment lawsuits. At least three former female employees have claimed that they were pressured into showing their breasts to Koko. They alleged that Patterson encouraged the behavior, often interpreted Koko's signs as requests for nipple display, and let them know that their job would be in danger if they "did not indulge Koko's nipple fetish." Koko has been known to playfully grab both male and female nipples without warning or provocation. Patterson claims that Koko uses the word "nipple" to refer to humans because it sounds like "people".
All claims of harassment have been permanently dropped as of November 21, 2005 after the foundation and the parties involved reached a settlement.
Jody Weiner, Koko's lawyer, writes about Koko and sexual harassment in the book Kinship With Animals.