Throughout the animal kingdom, males, rather than females, usually initiate courtship, largely because

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This is due to anisogamy (different-sized gametes). Males produce many small, cheap sperm cells, while females produce fewer, larger, and more expensive egg cells. Therefore, the competition of males for the opportunity to fertilize females is more intense than females for males. Males are more likely to initiate courtship as a way to compete for female attention and increase their chances of mating.

Throughout the Animal Kingdom, Males, Rather Than Females, Usually Initiate