"He-asses" is a derogatory term used to refer to male donkeys. However, if you're looking for a more polite or technical term, there are several synonyms you could use. One option is simply "male donkeys," which is the most straightforward and neutral term. Another alternative is "jackasses," which is slightly less common but still widely recognized. Additionally, you could use the scientific term "Equus africanus asinus," which refers to the species of domestic donkey. No matter which term you choose, it's important to be respectful of these animals and avoid using derogatory language.