When Madonna first moved to New York City at 19, she was sexually assaulted. The singer has spoken about being raped in the past, writing about the assault in an essay for Harper’s Bazaar. On Thursday, Madonna talked to Howard Stern about why she never reported the rape to the police.

“I was going to a dance class and the door was locked, and I needed money for the telephone — the pay phone,” she said. “[This man] gave it to me.” Madonna said he offered to help her make the call. “He was a very friendly guy.”

“He said, ‘Well, I just live right across the street; do you want to make a phone call from my house?'”

Madonna explained that, being from Michigan, she “trusted everybody” — despite the fact that her apartment had been robbed multiple times, and she’d had a “crazy” first year in New York.

When the man brought Madonna into his apartment building, he sexually assaulted her at knifepoint. Madonna said that she decided not to report the incident to the police. “I was told that if I wanted to press charges, [I’d have to have a] physical examination, I have to go before the court, they are going to ask you all these personal questions.”

“You’ve already been violated,” said Madonna, “So then, do you want to talk about it? Do you want to make it public? No, it’s just not worth it. It’s too humiliating.”

Listen to the interview here.