His predecessor, Pope Benedict XVI, signed a document in 2005 that said men with deep-rooted homosexual tendencies should not be priests. Francis was much more conciliatory, saying gay clergymen should be forgiven and their sins forgotten.
Francis' remarks came Monday during a plane journey back to the Vatican from his first foreign trip in Brazil.
He was funny and candid during his first news conference that lasted almost an hour and a half. He didn't dodge a single question, even thanking the journalist who raised allegations reported by an Italian newsmagazine that one of his trusted monsignors was involved in a scandalous gay tryst.
Francis said he investigated and found nothing to back up the allegations.
Francis was asked about Italian media reports suggesting that a group within the church tried to blackmail fellow church officials with evidence of their homosexual activities. Italian media reported this year that the allegations contributed to Benedict's decision to resign.
Stressing that Catholic social teaching that calls for homosexuals to be treated with dignity and not marginalized, Francis said it was something else entirely to conspire to use private information for blackmail or to exert pressure.
Francis was responding to reports that a trusted aide was involved in an alleged gay tryst a decade ago. He said he investigated the allegations according to canon law and found nothing to back them up. But he took journalists to task for reporting on the matter, saying the allegations concerned matters of sin, not crimes like sexually abusing children.
And when someone sins and confesses, he said, God not only forgives but forgets.
"We don't have the right to not forget," he said.
The directness of his comments suggested that he wanted to put the matter of the monsignor behind him as he sets about overhauling the Vatican bank and reforming the Holy See bureaucracy.
Speaking in Italian with occasional lapses in his native Spanish, Francis dropped a few nuggets of other news:
-- He said he was thinking of traveling to the Holy Land next year and is considering invitations from Sri Lanka and the Philippines as well.
-- The planned Dec. 8 canonizations of Popes John Paul II and John XXIII will likely be postponed -- perhaps until the weekend after Easter -- because road conditions in December would be dangerously icy for Poles traveling to the ceremony by bus.
-- And he solved the mystery that has been circulating ever since he was pictured boarding the plane to Rio carrying his own black bag, an unusual break from Vatican protocol.
"The keys to the atomic bomb weren't in it," Francis quipped. Rather, he said, the bag merely contained a razor, his breviary prayer book, his agenda and a book on St. Terese of Lisieux, to whom he is particularly devoted.
"It's normal" to carry a bag when traveling, he said. "We have to get use to this being normal, this normalcy of life," for a pope, he added.
Francis certainly showed a human, normal touch during his trip to Rio, charming the masses at World Youth Day with his decision to forgo typical Vatican security so he could to get close to his flock. Francis traveled without the bulletproof popemobile, using instead a simple Fiat or open-sided car.
"There wasn't a single incident in all of Rio de Janeiro in all of these days and all of this spontaneity," Francis said, responding to concerns raised after his car was swarmed by an adoring mob when it took a wrong turn and got stuck in traffic.
"I could be with the people, embrace them and greet them -- without an armored car and instead with the security of trusting the people," he said.
He acknowledged that there is always the chance that a "crazy" person could get to him. But he said he preferred taking that risk than submitting to the "craziness" of putting an armored wall between a shepherd and his flock.
Francis' news conference was remarkable and unprecedented: Pope John Paul II used to have on-board press conferences, but he would move about the cabin, chatting with individual reporters so it was sometimes hit-or-miss to hear what he said and there were often time limits. After Benedict's maiden foreign voyage, the Vatican insisted that reporters submit questions in advance so the theologian pope could choose the three or four he wanted to answer and prepare his answers.
For Francis, however, no question was off the table, no small thing given that he is known to distrust the mainstream media and had told journalists en route to Rio that he greatly disliked giving news conferences because he found them "tiresome."
Francis spoke lovingly of his predecessor, Benedict XVI, saying that having him living in the Vatican "is like having a grandfather, a wise grandfather, living at home." He said he regularly asks Benedict for advice, but dismissed suggestions that the German pontiff was exerting any influence on his papacy.
On the contrary, Francis said he had tried to encourage Benedict to participate more in public functions at the Vatican and receive guests, but that he was "a man of prudence."
In one of his most important speeches delivered in Rio, Francis described the church in feminine terms, saying it would be "sterile" without women. Asked what role he foresaw, he said the church must develop a more profound role for women in the church, though he said "the door is closed" to ordaining women to the priesthood.
He was less charitable with the Vatican accountant, Monsignor Nunzio Scarano, who has been jailed on accusations he plotted to smuggle â¬20 million ($26 million) from Switzerland to Italy and is also accused by Italian prosecutors of using his Vatican bank account to launder money.
Francis said while "there are saints" in the Vatican bureaucracy, Scarano wasn't among them.
The Vatican bank, known as the Institute for Religious Works, has been a focus of Francis' reform efforts, and he has named a commission of inquiry to look into its activities amid accusations from Italian prosecutors that it has been used as an offshore tax haven to launder money.
Asked if closing the bank was a possibility, Francis said: "I don't know how this story will end."
"But the characteristics of the IOR -- whether it's a bank, an aid fund or whatever it is -- are transparency and honesty."
Follow Nicole Winfield at www.twitter.com/nwinfield
Copyright 2013 The Associated Press.