"I don't keep up with it all," Fox told Vulture.com when asked at a book party about the idea of Swift dating 23-year-old Sam. "But Taylor Swift writes songs about everybody she goes out with, right?"

When the reporter answered in the affirmative, Fox replied, "What a way to build a career."

Prodded further, Fox said, "I wouldn't even know who she was" if she showed up at his house on his son's arm. But he'd probably put two and two together, he added, upon the release of the inevitable breakup tune.

"'Sam, You Piece of S--t,'" Fox joked, imagining his reaction. "'Oh...that was the girl you brought home!'"

Fox's rep has not yet returned a request for comment.

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