The scandal got seamier Thursday when the site posted an unredacted crotch shot that it said Weiner sent to a woman last year.
When reporters attempted to pin down the evasive Weiner as to the number of women with whom he had exchanged illicit messages, he delivered a rambling response before settling on "six to 10, I suppose." His campaign later clarified that of that total, Weiner corresponded with three of them after leaving office.
Weiner said he was still "working with people" to get help dealing with his penchant for X-rated online flirting, but he disputed that it's an addiction.
"I don't believe that it is. The people that I am working with don't believe that it is," he told reporters.
"The point is that it's behind me," he said. "I have worked through these things."
The woman who claims to have engaged in the online sex chats with Weiner, 23-year-old Sydney Leathers, confirmed her identity Thursday and told "Inside Edition" that Weiner disgusted her.
"He's not who I thought he was," she told the show.
She said Weiner told her that he loved her and she reciprocated. Asked what advice she would give the embattled mayoral candidate, she said, "Stop lying, stop embarrassing his wife and get help."
Leathers, who hails from Mount Carmel, Ill., and Princeton, Ind., said Weiner started corresponding with her last July, more than a year after he stepped down from Congress and within weeks of a glowing People magazine cover story about his repaired marriage to Hillary Rodham Clinton aide Huma Abedin.
While Weiner says he bets voters care more about their futures than his past, some appear to have deserted him in the first poll taken entirely after his latest indiscretions were revealed.
Before the revelations, Weiner was leading most polls gauging the primary race. But a new NBC 4 New York/Wall Street Journal/Marist poll showed he fell behind City Council Speaker Christine Quinn in the crowded Democratic field.
She leads him 25 percent to 16 percent among registered Democratic voters, according to the poll, which surveyed 551 such voters Wednesday and has a margin of error of plus or minus 4.2 percentage points. It found Weiner roughly even with city Public Advocate Bill de Blasio and former city Comptroller Bill Thompson, both at 14 percent; results were similar among likely Democratic voters.
The poll also found 55 percent of registered Democrats now have an unfavorable impression of Weiner, while 30 percent see him favorably. The numbers were nearly the reverse of a June poll by the same entities, which tallied a 52-36 percent favorable-to-unfavorable split then.
"New York City Democrats were willing to give Anthony Weiner a second chance but are reluctant to excuse his behavior now," Marist College polling director Lee Miringoff said in an analysis of the results.
Still, Democratic voters are roughly evenly split on whether he should drop out of the race, and on whether his digital dalliances will affect their votes.
Those who have donated to his campaign were also conflicted.
Paula Corsi, 46, of Queens, gave $35 to Weiner at a fundraiser June 25. She said she is concerned about this week's revelations but believes Weiner has good ideas and wants him to stay in the race.
"If the people really don't want him to run they'll tell him in September" in the primary, she said. "Let the voters decide."
But architect Charles Thanhauser, 61, said he regrets giving Weiner $100.
"The continuing texting a year after he resigned from Congress makes me think there's something extremely wrong with him," said Thanhauser, of Manhattan. "It makes me question his motives in running for office. It makes me question his judgment."
Weiner has been urged to quit the race by newspaper editorial boards some rivals. And on Thursday, House Minority Leader Nancy Pelosi called his behavior "reprehensible" and "disrespectful of women." But she said it was up to him to decide whether he should leave the mayor's race.
Associated Press writer Henry C. Jackson in Washington and David B. Caruso and Karen Matthews in New York contributed to this report. Reach Jonathan Lemire on Twitter at (at)JonLemire.