O'Reilly last night sparred with Barbara Walters about the "pinheads" on her 'Most Fascinating People' list, asking Walters if it was appropriate to ask Oprah if she's gay.
Walters says she wouldn't have asked Oprah if she knew she was trying to keep it a secret, like she did to Ricky Martin years ago.
"If you were trying to keep it a secret Bill, I wouldn't ask you. Promise."
Adds O'Reilly,later int he interview, "You didn't ask Palin if she's a lesbian?"
Watch, AFTER THE JUMP...