Why is a stick of gum like a sneeze?

its "a chew"

How is this related to algebra?

A stick of gum is not inherently like a sneeze, as they are two distinct objects with different properties and functions. However, if you are referring to a metaphorical comparison, where two unrelated things are linked for the purpose of illustrating a point, the specific comparison between a stick of gum and a sneeze may be open to interpretation. It would be helpful to provide more context or articulate the specific context in which someone would compare these two things.