Last night Barbara Walters introduced Lady Gaga on her ABC special The 10 Most Fascinating People Of 2009 by saying her act “is a head-on collision between performance and art and underwear.”

But if that quip didn’t shock Grandma out of her rocking chair while watching at home, then asking if the “bluffin’ with my muffin” line in Gaga’s “Poker Face” means that the singer is bisexual might have. Watch the clip below.

“I do like women,” the 23-year-old responded. “I’ve only been in love with men. I’ve never been in love with a woman. But that’s really what the song is all about—why, when I was with my boyfriend, was I fantasizing about women?”

Not content to leave it at that, Walters then asked point blank if she’s ever had sex with women. After stumbling over her words a bit, Gaga replied, “I’ve certainly had sexual relationships with women.”

Geez. Sounds like Barbara needs to get, uh, loosened up a bit.

Catch Lady Gaga’s interview with Barbara Walters—which is really just four minutes of talking about the performer’s sex life—below: