reassurance Goodall Reassurance suckle: A brief suck when the infant has been frightened or hurt. Absent in bonobos. See video. suck self Suck own nipples. Female who has lost newborn rarely sucks her nipples. Matsumoto-Odas Self suckle. 8. See video. suck thumb Infant sucks own thumb, but rarely sucks other digits. See videos. suck toe Infant sucks own toe like suck thumb. Adults and immatures suck toe to remove eggs of sand flea. See also remove sand flea. Category 2. See video. suckle Mother allows infant to suck from nipples. Goodalls Suckle. Kanos Suckle for bonobos. See video. supplant Nishida and Turner Displacement. Displace another from food patch by bark, approach, run, push, raise arm quickly, or shake branch. Adult males usually supplant adult females and other adult