 When infants bring solid foods to their own mouth, they are the ones guiding the sensory experience, starting and stopping when they are comfortable and ready.When food does move too posteriorly in the mouth triggering a gag reflex, the "entire" bolus is expelled from the mouth.Also, food moves slowly in comparison to liquid, and is not often sucked into the pharynx, allowing for laryngeal penetration or aspiration of the bolus.