The fearmongering begins: "When a man attacks a man, he either wants his money or his life. When a man attacks a woman, he either wants her money, her life OR HER BODY. The nature of the conflict is, by definition, hugely different." (from http://www.rapeescape.com/philosophy.htm)
You should take a look at this: http://www.nononsenseselfdefense.com/rape.html
I don't believe that there's a separate self-defense for women and self-defense for men, and this is what your rape seminar implies.
Most rapes are committed by someone the victim knows (up to 80-90 percent of all rapes), your best defense against rape is being careful about who you associate with (though you can't choose your family I'm afraid). Otherwise, the methods to avoid any kind of attack (robbery, stranger rape, etc) in the first place are the same, whether you're a man or woman.