Hinny is easier to obtain when the lower chromosome count, the donkey, is in the male. Therefore breeding for hinnies is more hit-and-miss than breeding for mules." The male hinny or mule can and will mate, but the emission is not fertile. Male hinnies and mules are usually castrated to help control their behavior by eliminating their interest in females. Female hinnies and mules are not customarily spayed, and may or may not go through estrus. Female mules have been known, on rare occasions, to produce offspring when mated to a horse or donkey, although this is extremely uncommon. Since 1527,
Social groups in male and female prisons in the United States Southwest. She found that officers consistently expressed a preference to work in men's prisons, citing differences between male and female inmates as the main cause; officers perceive female inmates to be more difficult to manage, more likely to question an instruction, and less respectful than males. Many respondents also characterized female inmates as more emotional and therefore more likely to become inexplicably violent, while male violence is rationalized as having understandable goals. In this way, female violence is seen as irrational and ineffective whereas male violence is seen as meaningful and understandable. Britton notes that these perceptions seemed to be