“The Golden Bachelor” showed that sex is not just for spring chickens. Hearing aids and making out in a hot tub can go blissfully together.

Now comes the Golden President. Even though fretful questions about his age have engulfed Joe Biden’s campaign, one thing is clear: His romance with Jill is still crackling.

I have observed that myself. At a party at his house at the Naval Observatory when he was vice president, he told me about the frisson of watching his wife come down the stairs, dressed up for a special occasion.

They had been married for decades, he said, “but my heart still goes pitty-pat when I see her.”

Biden’s uxorious relationship with his wife has sealed her role as his top navigator as he charts his re-election course as the oldest president in American history.

The amorous Biden marriage is chronicled in a new book by Katie Rogers, a New York Times White House correspondent: “American Woman: The Transformation of the Modern First Lady, From Hillary Clinton to Jill Biden.”

Parenthetically, Rogers notes: “Joe may have tamped down his public bedroom declarations winning the presidency, but he has joked to aides that ‘good sex’ is the key to a lasting and happy marriage, much to his wife’s chagrin.”