"I'm not here to glamorise prostitution. It's a job with good sides and down sides," she says. "I have no personal regrets.
"I enjoyed connecting with strangers on a deep level, having a relationship that in a way seems surreal. I was using a fake name, presenting a different side of myself. I was getting paid for presenting the sexiest side of myself.
"I could connect deeply with a person, perhaps on the deepest level β sex β and then exit their lives."
The young escort, who went by the name Mary Ann because "it sounded so wholesome", says that unlike some of her co-workers, she had no compunction about having sex with 80-year-old Albert. "I was fascinated by how people's bodies worked, what they did," she says. "Granted, the smellier clients were not pleasurable. But the 80-year-old, I find nothing wrong with his body."
Werhun initially wanted to be a stripper, until a friend's mother suggested escorting could be more profitable. The then 21-year-old had been interested in selling sex since working as a barista and realising she made better tips when she wore a low-cut top and flirted. "Why not get straight to the point?" she asks.
She began working as an escort while at university, and quit around the age of 25 after her mother requested it.
Werhun sees her former role as being to "accept people for who they are" and suggests her clients were "paying to not be rejected".
She says she loved "learning about people and sexuality" and found the job "compelling".
The ex-escort hopes her book will demystify the enriching, funny and sad elements of the job, in a book her MC describes as a "variety show" of sex work.
In one tongue-in-cheek section, she prints reviews of herself that anonymous "johns" posted online, and follows them with her own, candid reviews of them. The reviews are littered with acronyms such as DFK (deep French kissing) and MPOS (multiple positions).
"I'm naturally unjudgmental, open-minded, interested in people," she says. "I take the job seriously. My role is to accept people for who they are."
Werhun says her years as an escort taught her "about people and sexuality" in ways she wanted to share with others.
"It elevates the escort as not just someone who allows their body to be violated but loves that person, for a moment."
Her book recounts the heartache of "coming out" to her Catholic mother. "I told her that being honest had extinguished the fire inside that threatened to burn me alive," writes the former sex worker in her book. "'Well,' she said morosely, 'You just lit me on fire.' I cried the whole way home."
Now, Werhun says, her immediate family have gone through a journey to become more accepting β although many of her extended family are horrified.
Perhaps the most confronting part of the book is a letter she wrote to a client after a "terrifying" sexual encounter. "You put your full weight on my body, looked me dead in the eyes without any words," she wrote.
He refused to put on a condom, rubbing against her despite her protestations, until she simply went limp. "I hope you'll consider the way you make other escorts feel in the future and take their wellbeing into consideration when paying them for sex," she said.
He never replied.
But she says it didn't put her off the profession. "As a woman, these things are going to happen to me anyways," she said. "These things happened to me at a job I liked. Even rape didn't stop me doing it. I had so many positive experiences."
She says the best way to protect sex workers is to decriminalise the job and treat it like any other. "Criminal law makes it nearly impossible for sex workers to come forward with their experience of abuse and rape," she says.
The #MeToo movement makes this a perfect time to talk about what being a sex worker really means, the author believes. "Sex workers aren't immediately included in stories of women coming forward about unwanted sexual harassment or abuse in the workplace," she says. "Society doesn't see sex work as work, or sex workers as people who can experience abuse on the job.
"We're not considered legitimate speakers. Our experiences should be taken as seriously."
Werhun says she accepts she is privileged as a white, middle-class woman, and that her experiences may not reflect those of sex workers who are less educated or wealthy, women of colour, or those dealing with mental health issues or abuse.
"All these things make people more vulnerable to the law β that wasn't something I ever had to deal with directly," she says. "There are so many angles to sex workers' experiences that I can't really touch because that's not my experience."
Her book, complete with a wide array of photos taken by her friend and videographer Nicole Bazuin, allows her to "transform" into different roles held by sex workers and women, she says.
"We play with representation. It's not strictly glamorised or demonised. The stories and photos show the full humanity of the job."
Werhun says she isn't ashamed of having sex for money. It's only society that projects its shame onto her.
"I wanted to show my human, relatable, funny and at times gut-wrenching experiences. And they're not necessarily exclusive to a sex worker.
"What two consenting adults do on their own time is up to them. We're not hurting anybody and we don't deserve to be hurt."
The young woman is in the same long-term relationship she's been in since she worked in escorting, and says her partner is "supportive".
She simply wants to show people what it's really like to be a sex worker in the modern world.
Modern Whore by Andrea Werhun is available to buy now at modernwhore.com