A toothbrush having a longitudinal axis, comprising a lower section and an upper section. The upper section and the lower section are generally aligned along the longitudinal axis. The lower section comprises a lower handle section and a shaft extending therefrom. The upper section comprises an upper body and a longitudinal cavity. The longitudinal cavity wall conforms to an outer wall of the shaft and is shaped so as to hold the shaft securely enough to avoid separation between the upper and lower sections. The longitudinal cavity wall is shaped so as to mate with the outer wall loosely enough to allow a force of the head pressing against the teeth of a user to effectuate a lateral rotation of the upper section in relation to the lower section. The lateral rotation reduces an amount of manual rotation of the toothbrush performed by the user.