Observed throughout the animal kingdom, courtship(求愛行動)is the practice of wooing(求婚する)a member of the opposite sex with the ultimate goal of mating. Animal courtship may involve complicated dances or touching; vocalizations(歌うこと、音をだすこと); or displays of beauty or fighting prowess(勇敢な行為). Humans, meanwhile, have evolved elaborate courtship rituals involving flowers, gifts, songs, poetry, restaurants, and various displays of affection.