It depends on which John Wells you're talking about:
John Wells (satirist) (1936-1998), British satirist
John Wells (sportscaster) (born 1946), Canadian sportscaster
John Wells (TV producer) (born 1956), theater and television producer and writer
John K. Wells (fl. 1920s), film director
John Wells (lawyer), founder of law firm Cadwalader, Wickersham & Taft
John A. Wells, lawyer and founder of law firm Roger & Wells
John S. Wells (1803-1860), United States Senator from New Hampshire
John Wells (politician) (born 1925), British Conservative MP for Maidstone, 1959-1987
John Wells (19th century politician) (1761-1848), British MP for Maidstone, 1820-1830
John Wells (1817-1877), United States Representative from New York
John Wells (Nova Scotia politician) (1772-?), merchant and political figure in Nova Scotia
Jonathan Wells (intelligent design advocate) (born 1942), real name John Corrigan Wells
John Wells (Mormon) (1864-1941), general authority of The Church of Jesus Christ of Latter-day Saints
John Wells (Baseball) (1922-1993), pitcher in Major League Baseball
John Wells (cricketer) (1760-1835), English cricketer
John Wells (jockey) (1833-1873), British champion jockey
John Wells (rower) (1847-1929), represented the United States at the 1904 Summer Olympics
John Wells (rugby union) (born 1963), English rugby union footballer and coach
John C. Wells (born 1939), British linguist, phonetician and Esperantist
John Keith Wells (born 1922), highly-decorated U.S. Marine at Iwo Jima
John Wells (architect), architect whose works include the Bank of Montreal Head Office, Montreal
John Wells-Thorpe (b.1928), English architect
John Wells (artist) (1907-2000), Cornish painter
John W. Wells (1907-1995), American paleontologist, biologist and geologist
John Mahoney, best known from his role on Frazier, has not publicly stated his sexual orientation, though there are many rumours and speculation.
The cast of Sexual Harassment Orientation - 2013 includes: Brian Guest Travis Van Winkle as John
Nothing is known of her sexual orientation.
The Joker's sexual orientation is not written into his character.
Soko's sexual orientation is heterosexual/straight.
strait
WikiAnswers does not know for sure at this time the sexual preferences of Josh Wells.
The historical figure John Dodd, a member of Parliament, is the only semi-famous John Dodd I can find, and there is no information about his sexual orientation.
[Unknown. Previous answer was rambling about why you shouldn't ask/care.]
John Heileman is straight.
no.
straight
he is straight.
John D. Rockefeller Sr. never publicly discussed his sexual orientation, but it appears that he was heterosexual.
John Mahoney, best known from his role on Frazier, has not publicly stated his sexual orientation, though there are many rumours and speculation.
Isn't he gay?
John Maybury, the filmmaker, is openly gay.