EXCLUSIVE: Andy Cohen Remembers the Time He Thought He'd Ruined Everything on 'Watch What Happens Live'

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ET's Carly Steel got a chance to spend a day in the life of the man behind The Real Housewives franchise: Andy Cohen.

"It's all fun for me. I'm passionate about everything I'm doing," Cohen told ET. "I am living the life I always dreamed that I would be living, so I pinch myself every day."

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In addition to The Real Housewives, Cohen hosts his own SiriusXM Radio show, Radio Andy, and produces/hosts the live late-night show Watch What Happens Live.

The Bravo talk show has become a favorite for reality TV fans for the candid responses Cohen is able to get out of his guests, but sometimes that can work against him. Cohen told ET that asking Oprah Winfrey whether she'd ever been with a woman before was one moment he feared he'd gone too far.

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"I was like, 'Oh my God! I think I've just ruined everything!'" Cohen admitted.

In the end, Oprah just answered, "No," and didn't make a big fuss about it.

Oprah wasn't the only person Cohen has directed that question at. When Cameron Diaz stopped by the studio, she answered in the affirmative.

"Yes, I have been with a lady," Diaz said with a giggle.

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Watch What Happens Live, which airs Sundays through Thursdays at 11 p.m. ET/PT on Bravo, celebrates its 1,000th episode next week.