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Sexual Selection

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

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