Butler, Patricia. Angels Dance and Angels Die
Pamela had been seeing a psychiatrist for years, ever since the first onset of Jim’s fame, and she had urged Jim on several occasions to come with her.
Paul Rothchild had also tried to get Jim to seek professional help on more than one occasion. “Oh! Everybody tried!” Rothchild recalled. “I tried a lot, especially when he brought up repeatedly his problems getting hard,” said Rothchild, referring to Jim’s increasing bouts with impotency, a problem not uncommon in alcoholics, which both Pam and Jim had spoken about with Paul.
“I don’t need to pay anyone to tell me what I already know,” was Jim’s usual reply to such suggestions. But Max held firm and made an appointment for Jim, an appointment Jim did keep. Unfortunately, the session didn’t accomplish quite what Max had hoped it would. Instead of opening his psyche to the psychologist, Jim instead challenged the doctor to a chess match, a game which Jim won. He never visited the doctor again. “How can I take advice from someone who can’t even win a chess game?” he asked facetiously.

Eve Babitz "Jim Morrison Is Dead and Living In Hollywood"
It has been rumored around L.A. that Oliver Stone is asking everyone in connection with the Doors movie if Jim was impotent, and it makes you think Oliver Stone doesn’t know much about Jim’s main disease. You’d think he’d at least read up on the symptoms that show up in a person who takes depressants as a cure for depression. Taking Seconal and Tuinal and drinking brandy will bring your sex life to a grinding halt.

Alan Graham, former husband of Jim's sister Anne Morrison interview. One thing you should know about Jim Morrison is that he was impotent. He could not produce children.

The Real-Life Death of Jim Morrison Slamming the door in the Woodstock Nation 1972 Bernard Wolfe for Esquire Magazine
Webeditor: the author communicates with Sherry, a groupie and this is what she says.
“This isn’t easy to write about but I’ll do it.
They’re talking up a Jim who’s a complete stranger to me, some pink-cheeked Little Fauntleroy of rock. The kids should get one long hard look at him without the velvet suit and lace collar. . . . He struck two notes when we started seeing each other. ‘You’re nice to look at and you’re bright, I can use you. Just get straight on this, you’re mine, you belong to me, you’re my property, you do what I want.’
And: ‘I know how to handle you, keep you dangling. Trust me, I know what I’m doing.’ . . .
He wanted dirty talk from me, it excited him. ‘Act like a bitch in heat, that’s all you are.’ ‘You have to beg me for it, say please.’ . . .
The sadomasochistic games. Always spanking me. ‘You’ve been a bad girl, haven’t you. You want to be punished. Come on, cry. I want you to cry, I want to hear you crying. Answer me. Say yes, say yes, sir.’ . . .
He wanted mostly to be the passive one. . . . I had to do things to him. He was mostly impotent, sometimes it would take hours.
Sometimes when it didn’t work, no matter how I tried, he’d turn violent. Very. Choke me and beat me. I had a lot of black and blue marks to explain. Twice I think I was very close to getting killed, had to run. . . . Remember what he wrote about seeking to break the spell of passivity with actions cruel and awkward. He knew what he was talking about.
After hours of being inert and giving orders, being catered to, he could be cruel, oh, yes. . . . Big problem of impotence. Most of the time with me he never had an orgasm, gave up. A few times he acted as though he did but I sensed it was an act. I never had a full response and it would drive him wild, he thought I was holding out on purpose, he’d squeeze my windpipe hard. . . . The brute and the baby. His oscillation between the two. A lot of roughing up, then the sudden collapse, whimpering, ‘I need somebody to love me, please take care of me, please don’t leave me.’ . . .
Real-Life Death article in Esquire
Angels Dance And Angels Die