Title: John F. Kennedy
Content:   Kennedy was single in the 1940s while having relationships with Danish journalist Inga Arvad and actress Gene Tierney. During his time as a Senator, he had an affair with Gunilla von Post, who later wrote that the future President tried to end his marriage to be with her before having any children with his wife. Kennedy was also reported to have had affairs with women such as Marilyn Monroe, Judith Campbell, Mary Pinchot Meyer, Marlene Dietrich, Mimi Alford, and his wife's press secretary, Pamela Turnure. The extent of Kennedy's relationship with Monroe is not fully known, although it has been reported that they spent a weekend together in 
Title: John F. Kennedy Jr.
Content:  While attending Brown University, Kennedy met Sally Munro, whom he dated for six years, and they visited India in 1983. While he was a student at Brown, he also met socialite Brooke Shields, with whom he was later linked. Kennedy also dated models Cindy Crawford and Julie Baker, as well as actress Sarah Jessica Parker, who said she enjoyed dating Kennedy but realized he "was a public domain kind of a guy." Parker claimed to have no idea what "real fame" was until dating Kennedy and felt that she should "apologize for dating him" since it became the "defining factor in the person" she was. Kennedy had known actress Daryl Hannah since their two families had vacationed together in St. Maarten in the early '80s. After meeting again at the wedding of his aunt Lee Radziwill in 1988, they dated for five and a half years, though their relationship was complicated by her feelings for singer Jackson Browne, with whom she had lived for a time. Also during this time, Kennedy dated Christina Haag. They had known each other as children, and she also attended Brown University.
Title: Judith Exner
Content:  In 1977, Exner published Judith Exner: My Story. In her memoir, she said that her relationship with Kennedy was entirely personal. She also said that Frank Sinatra later introduced her to Sam Giancana, with whom she also became intimate. She said that Giancana never asked her for any information related to Kennedy. She also said that John Roselli was her friend. Aside from her own alleged affair with JFK, Exner claimed to have knowledge of other women who had affairs with Kennedy. These affairs included one with Danish journalist Inga Arvad between late 1941 and early 1942. Exner also said that Kennedy brought prostitutes to the White House swimming pool. Journalists and some historians have also alleged that Kennedy had a number of affairs, citing a memo by FBI Director J. Edgar Hoover as part of the evidence. Exner said that President Kennedy's Special Assistant David Powers helped set up encounters with President Kennedy. Powers later stated that Kennedy never had an affair with Exner.
Title: Leon Isaac Kennedy
Content:  Kennedy has been married three times. In June 1971, Kennedy, then 22, married Jayne Harrison, a 19–year old beauty pageant contestant who was from Wickliffe, Ohio; they divorced in 1982. In 1995, Kennedy married Lolita Armbrister. In August 2005, Kennedy married actress Maureen LaVette. Kennedy became a Christian evangelist during the early 1990s. In 2014, Kennedy sued Ebony magazine and Johnson Publishing Company; claiming in an article for their March 2013 "Scandal" issue the magazine falsely identified him as the person who leaked the infamous 1970s sextape of him with his then–wife Jayne Kennedy during their 1981 divorce proceedings.
Title: 1960 United States presidential election
Content:  FBI surveillance records confirmed that he was having an affair with a woman named Inga Arvad; then, in 1958, a couple named Leonard and Florence Kater found out that their tenant, Pamela Turnure, a secretary in Kennedy's Senate office, had been having an affair with the soon-to-be president. The Katers rigged up a tape recorder to pick up the sounds of the couple's love-making, and snapped a picture of Kennedy himself. The Katers sent this information to the newspapers, and one company — Stearn Publications — passed it along to Hoover. Soon after, "he quietly obtained a copy of the compromising sex tapes and offered them to Lyndon 
Title: David Powers
Content:  Judith Campbell Exner in her 1977 autobiography Judith Exner: My Story alleged that Powers assisted in setting up her sexual encounters with President Kennedy. Powers would later claim that Kennedy never had an affair with Exner, stating that the only Campbell he knew was "chunky vegetable soup." In her book, Once Upon a Secret: My Affair with President John F. Kennedy and Its Aftermath, Mimi Alford claimed that while she was swimming with President Kennedy and David Powers one afternoon in the indoor White House pool, President Kennedy swam to her and whispered a request for her to give oral sex to Powers. Alford wrote that she complied with President Kennedy's request. According to Alford, Powers arranged her first two trysts with Kennedy. Historian Robert Dallek has 
Title: John F. Kennedy Jr.
Content:  and featured two of Kennedy's cousins, Michael LeMoyne Kennedy and Joseph P. Kennedy II. Michael had been accused of having an affair with his children's underaged babysitter, while Joe had been accused by his ex-wife of having bullied her. John declared that both his cousins had become "poster boys for bad behavior"—believed to be the first time a member of the Kennedy family had publicly attacked another Kennedy. He said he was trying to show that press coverage of the pair was unfair, due to them being Kennedys. But Joe paraphrased John's father by stating, "Ask not what you can do for your cousin, but what you can do for his magazine."
Title: List of federal political sex scandals in the United States
Content:  affairs, including allegations of involvement with Marilyn Monroe, Judith Campbell Exner, and with intern Mimi Alford during 1962–1963. ; Lyndon B. Johnson, President (Democrat-Texas) — had extramarital affairs with multiple women over the years, in particular with Alice Marsh (née Glass), who assisted him politically. One such affair with Madeleine Duncan Brown allegedly led to her pregnancy with a son out of that relationship. ; William O. Douglas, U.S. Supreme Court Justice (Democrat) — allegedly pursued other women while married to his third wife, which, combined with his three divorces and remarriages, was considered scandalous. He also reportedly tried to molest a flight attendant in his judicial chambers. Attempted impeachment based upon his moral character failed, when the House Judiciary Committee found insufficient grounds for impeachment.  (1960s) 
Title: David Powers
Content:  that Powers was a "facilitator" of Kennedy's affinity for extramarital relations, discreetly arranging the time and places for trysts with a variety of women. Journalist Seymour Hersh interviewed former Secret Service agent Larry Newman. Newman told Hersh that Powers "would find the women or bring the women along" for extramarital trysts with Kennedy on presidential trips, and alleged that Powers and Kenneth O'Donnell, another Kennedy aide, "could have been better friends, in my opinion...and also they could have had more respect for the security...they were really running a hard risk" in bringing women not checked by security into Kennedy's hotel rooms. In his 2008 memoir Counselor, Theodore Sorensen wrote that he "would not be shocked to learn that Dave Powers" had arranged extramarital trysts for President Kennedy.
Title: Kitty Kelley
Content:  In 1990, Kelley wrote a piece for People magazine based on interviews she had conducted with Judith Campbell Exner, a former girlfriend of Frank Sinatra's who claimed to have had an affair with John F. Kennedy. Exner told Kelley that she had arranged ten meetings between Kennedy and Mafia gangster Sam Giancana, and they discussed having the mafia kill Fidel Castro. It was subsequently revealed that Exner, who was terminally ill, had been paid $50,000 to talk with Kelley and had not mentioned these "revelations" in her own autobiography, published years earlier. A former FBI agent said that Giancana had been under a federal wiretap, so these multiple meetings with Kennedy would have been impossible to cover up.

Question: who did john kennedy have affairs with?
Answer: william averell harriman appointed by john fitzgerald kennedy.