In Amy Schumer‘s hit summer 2015 comedy Trainwreck, the actress plays a hard-drinking writer who’s also a serial dater. The character shares Schumer’s name, and some aspects of her life – like a father with multiple sclerosis – similarities that, the star tells PEOPLE, have led audiences to make some assumptions.
Schumer, whose new book, The Girl with the Lower Back Tattoo, was released on Tuesday, says that they are many misconceptions about her personality – compounded by a make-no-apologies approach to comedy and Hollywood.
“I think [people would be surprised by] the amount I drink,” the star tells PEOPLE in the magazine’s new issue, which also includes an exclusive excerpt from Schumer’s book. “I think I advertise the frequency with which I drink pretty honestly.”
The star says she sticks to wine: two glasses, four or five nights a week. “But on those nights sometimes I’ll have three,” she admits. “And that is the most it gets.”
Other illusions about Schumer include her sexual prowess, and a few taboo topics, she says.
“I think people would be pretty surprised to learn I’ve never had an abortion,” Schumer tells PEOPLE. “There are times in my life I’m sure I would have, I’ve just never gotten pregnant.”
She adds, “People think of me, they picture me drinking a 40 out of a bag on my way to get an abortion.”
RELATED VIDEO: See Amy Schumer’s Trainwreck Dad Meet Her Real Dad
Despite her candidness, Schumer says she’s an introvert – a character trait she’s stopped pushing back on.
“I think realizing that about myself and not fighting it, but instead just taking care of myself and letting myself recharge and having time on my own and also planning for that,” she says, “has made me better and able to do more.”
For more from Schumer, pick up the new issue of PEOPLE, on newsstands Friday
Schumer opens up about a variety of topics in The Girl with the Lower Back Tattoo, including the fact that she lost her virginity during nonconsensual sex.
“Without asking first, without kissing me, without so much as looking me in the eyes – or even confirming if I was awake,” she writes. Her boyfriend later apologized, and a young Schumer accepted. “I was seventeen years old and wanted my boyfriend to like me.”