aggressively Goodall Pinch. Plooijs Pinch. Squeeze skin between thumb and index finger. Idiosyncracy of male chimp at Gombe. Absent at Mahale. Absent in bonobos. pinch clitoris Pinch clitoris of juvenile or infant female as tickling. See video. pirouette Goodall: progresses in a series of tight circles, moving on all fours or on their feet. Type of locomotor play. Seen in older infants, juveniles and young adolescents at Mahale. Juvenile female, Ivana, once pirouetted in order to solicit play from small infant, but usually done as solo play. Probably absent in bonobos of Wamba, perhaps different from Pikas Ice skating. See video. P play Goodall divided play into lone play and social play. She split play into four categories, locomotor play, or van Hooffs Gymnastic, nest play, object play,