Mathematical toy model inspired by the problem of the adaptive origins of the sexual orientation continuum

TL;DR

This paper introduces a simple mathematical model to explore how the balance between trait diversity and sexual dichotomization influences the development of sexual orientation in animals, providing insights into its adaptive origins.

Contribution

It presents a novel analytical toy model that captures the tradeoff between trait diversity and sexual dichotomization, offering a new perspective on the evolution of sexual orientation.

Findings

Model suggests a continuum of sexual orientations based on trait tradeoffs

Highlights the role of evolutionary pressures in shaping sexual behavior

Provides a mathematical framework for future empirical testing

Abstract

Same-sex sexual behavior is ubiquitous in the animal kingdom, but its adaptive origins remain a prominent puzzle. Here I suggest the possibility that same-sex sexual behavior arises as a consequence of the competition between an evolutionary drive for a wide diversity in traits, which improves the adaptability of a species, and a drive for sexual dichotomization of traits, which promotes opposite-sex attraction and increases the rate of reproduction. A simple analytical "toy model" is proposed for describing this tradeoff. The model exhibits a number of interesting features, and suggests a simple mathematical form for describing the sexual orientation continuum.