male pressures and female pressures are not the same. women and men put different amounts of energy and carry different risks into childbearing, thus their mati

male pressures and female pressures are not the same. women and men put different amounts of energy and carry different risks into childbearing, thus their mating strategies are different. Since men can mate with little risk they are inherently less choosy about mating partners. In all species the onus of sexual selection is on females (unless a shortage of males occurs, which is always temporary because it introduces pressure for male offspring).