frightened or nervous when dominant individuals closeby. Usually thumb only or thumb and index finger are used. Adult male, Alofu, dexterously alternates between right and left nipple when anxious and pant-grunting. When using right hand, simultaneously fumbles right nipple with thumb and left nipple with little finger, but when he using left hand, fumbles left nipple with thumb and right nipple with little finger. Nipples are massaged by circular movement of thumb and finger. Captive adolescent male bonobo did same in selfreassurance. 8. See video. F 82 funny face fumble penis Male occasionally fumbles his penis by hand, leading to penile erection. At Mahale, never culminates into ejaculation. For bonobos of Wamba, only one case of fumbling penis, which did not lead to ejaculation. 7. See video. fumble