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Sexual Selection

Life Expectancy Human Anatomy Human Sexuality Animal Intelligence Female Songbirds Morphological Traits Pheromones Gender Dynamics Behavioral Adaptations Animal Behavior Mate Selection Dynamics Lifespan Variation Lifespan Differences Male Competition Mate Choice Mating Signals Visual Signals Gender Roles Mating Behavior

Peer-Reviewed Study Finds Penis Size Shapes Female Attraction and Male Rivalry Perceptions

Using life-sized and online 3D models, researchers report evidence that the trait functions as a sexual ornament and a cue in male–male competition.

Sexual Selection, Not Just Chromosomes, Drives Lifespan Gaps Between Males and Females

Largest Cross-Species Analysis Maps Sex-Based Longevity Gaps in Mammals and Birds