Spurlock writes that he only learned about the rape accusation from a friend who was in a writing class with the woman. He says that his friend told him that she named Spurlock in an essay which was read aloud to the class.
Spurlock also writes that "around eight years ago" he paid money to a woman that he subjected to "verbal" harassment.
"I would call my female assistant 'hot pants' or 'sex pants' when I was yelling to her from the other side of the office," Spurlock writes.
"Something I thought was funny at the time, but then realized I had completely demeaned and belittled her to a place of non-existence. So, when she decided to quit, she came to me and said if I didn't pay her a settlement, she would tell everyone.
"Being who I was, it was the last thing I wanted, so of course, I paid. I paid for peace of mind. I paid for her silence and cooperation. Most of all, I paid so I could remain who I was."
Spurlock also writes that he was unfaithful to all of the women in his life, including his spouses and former girlfriends.
"Over the years, I would look each of them in the eye and proclaim my love and then have sex with other people behind their backs," he writes.
"I hurt them. And I hate it. But it didn't make me stop. The worst part is, I'm someone who consistently hurts those closest to me. From my wife, to my friends, to my family, to my partners & co-workers. I have helped create a world of disrespect through my own actions."
Spurlock has been married twice. His first marriage was to Alex Jamieson, a natural foods chief who also appeared with her then-boyfriend in Super Size Me.
The couple were married for five years before divorcing in 2011. They have one child together. Last year, Spurlock married his second wife, Sara Bernstein, after they dated for eight years.
Spurlock reveals that he was sexually abused as a boy. He also said that he has not gone a full week sober since the age of 13.
"More than anything, I'm hopeful that I can start to rebuild the trust and the respect of those I love most. I'm not sure I deserve it, but I will work everyday to earn it back."