Code review, fine. Code walkthrough, fine. Knowledge transfer, fine.
Trying to write code while someone is sitting close enough for sex? NOT fine.
Worst three hours of my life.
PP doesn't hamper concentration, it puts concentration completely out of reach. Like trying to write a book while breaking up with your spouse over the phone.
And no, I didn't click with the "partner." He was one of those obedient lickspittles that Microsoft favors so much now. I had four times his experience and he condescended to me because I was a contractor.
I quit the next day.