Would they really allow an unstable person...

Well, he wasn't sleeping with either of those, so he was probably okay. I do like the irony that an unstable person is working in a stable.

I saw the best minds of my generation destroyed by madness, starving hysterical naked.

I thought his problems were with sexual partners. As long as he wasn't sleeping with the horses or children, he would not have issues with them.

"Forget reality, give me a picture"-Remington Steele