"President Duterte acted like a feudal king who thinks that being the President is an entitlement to do anything that he pleases," said Senator Risa Hontiveros, who asked the public not to pass judgement on the woman. "Even if the act was consensual, it was the President, possessed of awesome, even intimidating, power who initiated it."

The left-wing Gabriela women's party condemned Duterte's act, which it said underscored his "machismo and misogyny". The "macho spectacle," it said, "alarmingly makes sexual advances against women look right."

Aside from growing alarm over his bloody crackdown against illegal drugs which has left thousands of mostly poor drug suspects dead, Duterte has come under fire from women's groups for sexist remarks, including one where he told troops to shoot female insurgents in the genitals during a public outburst against communist guerrillas.

He has also publicly kissed women in the past, including at rallies during his campaign for the presidency.

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The latest incident came near the end of a two-hour rambling speech, when Duterte offered the crowd a book about alleged corruption and abuse in the Catholic church. He pointed at two women.

"There's payment for this, a kiss. You in white, are you ready to engage in kissing? Come here," the 73-year-old Duterte said as he summoned the women to the stage.

One of the women gave the President a peck on the cheek. The other woman reached for the President's hand and put it on her forehead in a traditional gesture of respect for an elderly. But the President asked her to come closer for a kiss, pointing to his lips.

Amid the roar of the crowd, Duterte asked if the woman was married and if her husband was around. He inquired if she could explain to her husband that what they were about to do was just a joke.

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She said her husband wasn't around and replied yes to the President's other question.

"Make him jealous," the President said.

Duterte then leaned in and kissed the visibly overwhelmed woman, who screamed in joy and covered her face. He then hugged her.

"Don't take that seriously," Duterte later told the crowd. "It's just to give people fun."

The woman, who is married to a South Korean man and has two daughters, later said in a TV interview that she was thrilled by her face-to-face encounter with the President. She said there was "no malice" in the presidential kiss, which was meant to dazzle the crowd.

AP