Problem: Henry Havelock Ellis, known as Havelock Ellis (2 February 1859 - 8 July 1939), was an English physician, writer, progressive intellectual and social reformer who studied human sexuality. He co-authored the first medical textbook in English on homosexuality in 1897, and also published works on a variety of sexual practices and inclinations, as well as on transgender psychology. He is credited with introducing the notions of narcissism and autoeroticism, later adopted by psychoanalysis. Ellis was among the pioneering investigators of psychedelic drugs and the author of one of the first written reports to the public about an experience with mescaline, which he conducted on himself in 1896.

Dr. Havelock Ellis' 1933 book, Psychology of Sex, is one of the many manifestations of his interest in human sexuality. In this book, he goes into vivid detail of how children can experience sexuality differently in terms of time and intensity. He mentions that it was previously believed that, in childhood, humans had no sex impulse at all. "If it is possible to maintain that the sex impulse has no normal existence in early life, then every manifestation of it at that period must be 'perverse,'" he adds. He continues by stating that, even in the early development and lower function levels of the genitalia, there is a wide range of variation in terms of sexual stimulation. He claims that the ability of some infants producing genital reactions, seen as "reflex signs of irritation" are typically not vividly remembered. Since the details of these manifestations are not remembered, there is no possible way to determine them as pleasurable. However, Ellis claims that many people of both sexes can recall having agreeable sensations with the genitalia as a child. "They are not (as is sometimes imagined) repressed." They are, however, not usually mentioned to adults. Ellis argues that they typically stand out and are remembered for the sole contrast of the intense encounter to any other ordinary experience.  Ellis claims that sexual self-excitement is known to happen at an early age. He references authors like Marc, Fonssagrives, and Perez in France who published their findings in the nineteenth century. These early ages are not strictly limited to ages close to puberty as can be seen in their findings. These authors provide cases for children of both sexes who have masturbated from the age of three or four. Ellis references Robie's findings that boys' first sex feelings appear between the ages of five and fourteen. For girls, this age ranges from eight to nineteen. For both sexes, these first sexual experiences arise more frequently during the later years as opposed to the earlier years. Ellis then references Hamilton's studies that found twenty percent of males and fourteen percent of females have pleasurable experiences with their sex organs before the age of six. This is only supplemented by Ellis' reference to Katharine Davis' studies, which found that twenty to twenty-nine percent of boys and forty-nine to fifty-one percent were masturbating by the age of eleven. However, in the next three years after, boys' percentages exceeded that of girls.  Dr. Ellis also contributed to the idea of varying levels of sexual excitation. He asserts it is a mistake to assume all children experience are able to experience genital arousal or pleasurable erotic sensations. He proposes cases where an innocent child is led to believe that stimulation of the genitalia will result in a pleasurable erection. Some of these children may fail and not be able to experience this either pleasure or an erection until puberty. Ellis concludes, then, that children are capable of a "wide range of genital and sexual aptitude." Ellis even considers ancestry as contributions to different sexual excitation levels, stating that children of "more unsound heredity" and/or hypersexual parents are "more precociously excitable."

In that book he expalins how children can experience sexuality differentiability in two ways. What are those two ways he explains?

Answer with quotes: he goes into vivid detail of how children can experience sexuality differently in terms of time and intensity.

Question:
Steven Van Zandt (born November 22, 1950) is an American musician and actor, who frequently goes by the stage names Little Steven or Miami Steve. He is a member of Bruce Springsteen's E Street Band, in which he plays guitar and mandolin. He is also known for his roles on television dramas such as Silvio Dante on The Sopranos (1999-2007) and Frank Tagliano / Giovanni "Johnny" Henriksen on Lilyhammer (2012-2014). Van Zandt also has had his own solo band called Little Steven and The Disciples of Soul, active on and off since the 1980s.
Van Zandt became a songwriter and producer for fellow Jersey shore act Southside Johnny and the Asbury Jukes in 1974, penning their signature song "I Don't Want to Go Home", co-writing other songs for them with Springsteen, and producing their most-acclaimed record, Hearts of Stone. As such, Van Zandt became a key contributor to the Jersey Shore sound. He also produced two Gary U.S. Bonds' albums. Van Zandt then went on to share production credits on the classic Springsteen albums The River and Born in the U.S.A. The first Springsteen song he co-produced was "Hungry Heart." In 1989, Jackson Browne covered the 1983 Van Zandt composition "I Am A Patriot" on his World in Motion album. Van Zandt has produced a number of other records, including an uncredited effort on the Iron City Houserockers' Have A Good Time (But Get Out Alive). Less successful was his work on Lone Justice's second album Shelter, which was a career-ending flop for the Los Angeles cowpunk band.  In 1989, Van Zandt wrote "While You Were Looking at Me" for Michael Monroe's album Not Fakin' It and co-wrote videohits "Dead, Jail or Rock'n Roll" and "Smoke Screen". He was an arranger and backing vocalist for a few songs on the album. In 1992, he produced Austin TX-based Arc Angels' debut album. In 1991 Van Zandt produced a successful album, Spirit of Love, for Nigerian superstar and raggae icon, Majek Fashek. In 1993, Van Zandt wrote and produced "All Alone on Christmas" for the soundtrack of the Chris Columbus film Home Alone 2: Lost in New York, which yielded singer Darlene Love her first hit since "A Fine, Fine Boy" from 1963, thirty-one years earlier.  In 1994, Van Zandt produced the eponymous debut album of the punk rock band Demolition 23 which featured ex-Hanoi Rocks members Michael Monroe and Sami Yaffa. Van Zandt also co-wrote six songs for the album with Monroe and Jude Wilder. In 1995, Van Zandt aided Meat Loaf with the song "Amnesty Is Granted" off of his Welcome to the Neighborhood album. In 2004, he contributed the song "Baby Please Don't Go" to Nancy Sinatra's self-titled album.
Answer this question using a quote from the text above:

Was he a successful songwriter and producer

Answer:
In 1991 Van Zandt produced a successful album, Spirit of Love, for Nigerian superstar and raggae icon,