I understand why I imagined being robbed by a man: They're physically more dominating and I've never heard of anyone being robbed by a female. (Para.8)
dominate: vt. have control over (a place or a person), or be the most important person or thing
Often older children dominate their younger brothers and sisters. 大孩子经常控制小弟弟、小妹妹们。
Some people have the ability to dominate a conversation and do not permit other people to talk. 有些人能控制谈话，不让其他人发言。
hear of: to learn about; gain information about
We only heard of your intended visit yesterday! 我们是昨天才听说你的来访意向的。
Many people have heard of web learning but they have never tried it. 许多人听说过网上学习，可从未尝试过。
female: n. a woman or a girl; an animal that can produce babies from its own body
Male birds are often more brightly colored than female ones. 雄性鸟往往比雌性鸟更艳丽漂亮。
More females than males go into nursing in the States. 在美国从事护理工作的女性比男性多。