(CNN) - Embattled Rep. Eric Massa said Sunday that the ethics investigation surrounding him stems from a sexually laced conversation he had at a New Year's Eve wedding.
The New York Democrat said in his weekly radio show that he wasn't told about the ethics probe until after he decided to retire and that he first learned the details of the investigation from news reports.
While at a wedding for one of his staff members, Massa said he danced with the bride and bridesmaid as cameras rolled.
"Absolutely nothing occurred," while he was dancing, he said.
Massa said he then sat with some staff members who were all bachelors. In a conversation fueled by alcohol, one staff member "made an intonation to me that maybe I should be chasing after the bridesmaid," Massa said.
Massa said he told the staffer beside him, "Well, what I really ought to be doing is fracking you."
Massa said he "tousled the guy's hair and left – went to my room because I knew the party was getting to a point where it wasn't right for me to be there," Massa said.
"Now was that inappropriate of me? Absolutely. Am I guilty? Yes," he continued.
Massa said the staff member to whom he made the remark never told him he felt uncomfortable. Instead, Massa said, someone else went to another staff member who was uncomfortable for the first staff member. That person in turn went to the House Ethics Committee.
"It was a third-party political correctness statement," Massa charged, reiterating that his information comes not from the ethics committee, but from what he read in newspapers.
Massa, who voted against the House's health care reform bill in November, said that he was being pushed out so Democrats could move ahead with reform.
"Now they've gotten rid of me and it will pass. You connect the dots," he said.
Massa on Wednesday had said he would not seek re-election because of health concerns and denied reports that he had harassed one of his Capitol Hill staffers. Two days later, he announced he would resign from the House effective Monday.
In a statement Friday, Massa said he had already decided to quit because of concerns about cancer before he learned that a staffer had complained to the ethics panel.
"After I decided not to run again, I was told, for the first time, that a member of my staff believed I had made statements that made him feel 'uncomfortable,' " Massa wrote.
"I own this reality," he continued. "There is no doubt in my mind that I did in fact, use language in the privacy of my own home and in my inner office that, after 24 years in the Navy, might make a Chief Petty Officer feel uncomfortable. In fact, there is no doubt that this Ethics issue is my fault and mine alone."
He goes on to lament the "incredibly toxic atmosphere" in Washington and says that an ethics probe "would tear my family and my staff apart." Investigators, he said, would "be free to ask anything about me going back to my birth."
"I simply cannot rise to that level of perfection," Massa wrote. "God knows that I am a deeply flawed and imperfect person."
Massa defeated an incumbent Republican with 51 percent of the vote in 2008. But John McCain, the 2008 Republican presidential nominee, also carried the same congressional district by 51 percent, which gives the GOP hope of taking back the seat.
A link to Massa's radio show was posted on WHAM-TV's Web site.
–CNN's Rich Barbieri contributed to this report.