Like the origin of language, the origin of music has been a topic for speculation and debate for centuries. Leading theories include Darwin’s theory of partner choice (women choose male partners based on musical displays), the idea that human musical behaviors are primarily based on behaviors of other animals (see zoomusicology), the idea that music emerged because it promotes social cohesion, the idea that music emerged because it helps children acquire verbal, social, and motor skills, and the idea that musical sound and movement patterns, and links between music, religion and spirituality, originated in prenatal psychology and mother-infant attachment.