Is Feminism the Worst F-Word?

Why is it that my parents and friends, who often engage with me in discussions about feminist issues, sigh and roll their eyes when I tell them that I’ve joined my school’s feminist society?

Why is it that if I even mention the word ‘feminist’ to a boy they turn and run as far as they can because they think I’m trying to undermine them?

Why is it that, despite the near-synonymous meaning of the two different terms, people are more reluctant to associate themselves with the word ‘feminist’?