Courtship in animals
Outcrossing is the mating of individuals that are not genetically closely related.  Courtship during outcrossing faciltitates selection of a beneficial partner.  The alternative mating process is inbreeding, the mating of genetically related individuals.  Inbreeding leads to increased expression of deleterious traits, a phenomenon referred to as inbreeding depression.  Inbreeding often occurs when outcrossing opportunities are limited.  Courtship based selection of a partner is an important feature of outcrossing, but is likely less significant for inbreeding.