Men engaging in extreme beautification trends ('looksmaxing') often focus on traits that other men find formidable, such as a strong jawline. This intrasexual competition strategy may not align with what women actually find most attractive, which can be a slightly more feminized face on a masculine body.

Unlike most species, human females don't display overt fertility signs. This evolutionary trait encourages stable pair-bonding, as males must invest in a long-term relationship. It also reduces rivalry and aggression, fostering a more cooperative approach to raising children.

Men's pursuit of extreme muscularity and masculinized features is often a failure of cross-sex mind reading. They are coding for formidability and respect from other men, whereas research suggests women often prefer a more neutral or even slightly feminized face combined with a masculinized body.

To counteract historical male parental uncertainty, human babies have evolved to physically resemble their fathers for roughly the first year of life. This visual confirmation—a biological signal saying "I'm yours"—encourages the father's protection and resource investment during a child's most vulnerable period.

Women's preference for less lean, slightly "softer" male physiques may be an evolutionary adaptation. This physique signals "formidability"—the ability to win a fight and protect—which is valued over the aesthetic of being extremely "shredded."

Men consistently overestimate the level of muscularity women find attractive. This can be viewed through an error management framework: from an evolutionary standpoint, the fitness cost of being perceived as insufficiently strong is far greater than the cost of being perceived as too muscular.

Studies show that men primed with scarcity, such as being hungry, shift their preference toward larger female bodies. Body fat acts as a reliable signal of health, fertility insurance, and access to calories in resource-poor environments, making it more attractive when resources are uncertain.

In studies where people "buy" traits for an ideal partner with a limited budget, sex differences amplify. When forced to make trade-offs, men allocate more budget to physical attractiveness, while women allocate more to resources and status, revealing fundamental, constrained mate preferences.

Humans conceal ovulation, creating paternity uncertainty. A father's brain plasticity is an adaptive trait that avoids full biological commitment to a child until his investment is confirmed through hands-on caregiving, ensuring resources are more likely spent on his own offspring.