Grooming: Social grooming and self-grooming allow clack teeth crush gaze groom groom briefly groom by hand groom carcass groom leaf groom mutually groom object or substrate groom reciprocally groom self groom unilaterally groom with mouth groom wound groom, dyadic groom, polyadic groom-branch-clasp groom-hand-clasp groom-hand-clasp unilaterally inspect leaf presbyopia remove remove lice remove sand flea scrape scratch scratch socially scratch socially, poke type scratch socially, stroke type smack lip sputter squash ectoparasite on arm squash leaf 1-4-2. Grooming: Grooming posture and grooming request grab groom-branch-clasp groom-hand-clasp groom-hand-clasp unilaterally hold head or face lean forward lie supine with legs apart lie with back to another look back lower arm lower head lower leg offer arm offer back pull pull face to face pull head with hands push raise and hold