How heartfelt is the courting behaviour of albatrosses? And what depths does the sorrow for a deceased partner reach? In the animal kingdom, wedding bouquets are offered and beautiful structures built for the partner. These acts have all the trappings of love!
Yet what exactly is love? Even for humans, it is a vaguely described phenomenon consisting of various aspects. There is the longing to be together (forming a bond), being in love itself (a period of no inhibitions in order to enter into an intimate relationship with someone) and sexual cravings (lust). All these emotions are coordinated from within the brain and boosted by hormones.