Animals fear men for a reason. Men's BO triggers an acute fear response in rabbits, guinea pigs, rats, mice and hamsters. This experiment did require the animal to be sacrificed, hence why it only involves common laboratory animals.

Anyway. They noticed men would underestimate the suffering of a laboratory animal. They already knew that prey animals hide their pain when they are scared. This is to make them less of an easy target for birds of prey to hunt. Because a limping rabbit, is a much easier meal.

The reason why there was a difference in welfare scoring done by men and women, was because this fear response got triggered. They did an experiment where they had shirts be worn by a man, woman or both for 24 hours. Found that the animals didn't care for smells of women, but feared BO from men. It wasn't a skill issue, or lack of empathy.

We also find in wolves who are used to humans, that they are more hostile towards strange men than they are towards strange women.

Testosterone is not a friendly hormone. It leads to being easily agitatated in all mammals. The only reason higher levels of androgens in humans, correlates with decreased aggressive behaviour is because when we produce more androgens, we produce more estrogens. Which in turn fascilitate communication between two regions in the brain that determine emotional impulses and whether or not the person acts on it. Hence why men are less aware of their emotions (it's not just societal influence), more impulsive and more easily agitated/aggressive than women.

With bears you know what you can expect. And there are even things that can be done to save yourself. But with men? You never really know their intentions. It's why women's intuition exists at the level it does.