CK One Cologne by Calvin Klein Two bodies, two minds and two souls merge in the heat and passion of one: CK One by Calvin Klein is a beautiful unisex fragrance. This exciting cologne unites a man and a woman in one exciting scent, through a clean and fresh blend of citrus, green and woody notes. Top notes are pineapple, mandarin, bergamot, lemon, cardamom, papaya and green notes.