It encourages you to listen to your instincts, not fall into the trap of being palmed off as a "hysterical female" or feeling that you have to be nice to (usually men) who make you feel uneasy. That it's ok to tell a man to fuck off and not worry about his feelings.
First time round, I felt like I was being watched/followed and no one believed me. I knew it was a local man in his 30s. Everyone told me he was harmless. I was a teenager what did I know. I was encouraged to "be nice" to this "harmless" man.
It turned out he was completely obsessed with me. Police found a wall covered in photos, school newspaper articles, personal stuff from my bin etc. He followed me in a car after a school leavers party and jumped out on me outside my gate at 2am. Luckily my dad was waiting because I'd begged him for months to wait up as I felt I was being watched. The police got involved and he made threats about his own and my life.
Everyone loved the lecturer. Total dad figure, lovely, kind guy. We all felt a bit sorry for him, he was a bit of a fop, disorganised, gentle soul. He took a special interest in me, invited me to join me at specialist lecturers or assist him etc.
One lecture was in the middle of nowhere, it was very late at night, he was "worried" about me catching public transport at that hour and told me he'd drive me to his place and I could get a taxi from there or I could get dropped off at a rank. I'd known him three years, no reason to not trust him and I was a total teachers pet. Would have done anything to please him.
Something told me "don't go. don't trust him."
I was appalled at myself. He was a nice man, how dare I not trust him after everything he'd done to help me.
But I trusted that voice (it was very touch and go, but I remembered the book and knew, if he really was a good man then he wouldn't be offended at my no). He was clearly irked at my no.
Two years later I found out he'd raped at least 3 of my peers. They were in identical situations except they said yes and I said no to the offer to "get home safely". As time went on more stories came out. He was never brought to justice, insisted it was consensual and also threatened their careers.