IMO, It’s a lame excuse to get naked. Anecdotally, I haven’t met a whole lot of happy people who sleep around in an attempt to find their soul mate. I think you’ve got the question backwards, though. It’s more interesting to ask… Are there any psycho-sociological benefits to pre-marital sex? The research suggest a resounding NO. If you find someone who is truly your partner and equal in life, you can work out whatever minor differences you might have with regards to sex. (Most people have relatively tame sexual habits anyway.) Hopefully, the subject will have arisen prior to your honeymoon.
Since, I haven’t heard much in the way of fact or cites, I thought I’d pop in to offer some. Granted, they reflect my personal belief and like a lot of the assertions made in psychological or sociological studies, you can work the numbers or selectively edit their conclusions. So, don’t drag me into your flame wars. Thanks 
I would like to see some studies to the contrary, though …
I can’t find the URL for this, but it came from some pro marriage, family first type of organization … search on “pre-marital sex” and “co-habitation”.
Research That Suggests Pre-Marital Sexual Involvement Increases Chances of Marital Dissolution
According to a review of research by Dr. David Larson, a researcher at the National Institutes for Health (NIH) a link has been found between premarital abstinence and sexual satisfaction in marriage. “Couples not involved before marriage and faithful during marriage are more satisfied with their current sex life than those who were involved sexually before marriage.” (See also: David Larson, Mary Ann Mayo, Joseph Mayo and Paul Meier, Behind Closed Doors, unpublished manuscript, February, 1994, pp. 84-85.
Larson, B. David, MD, NM.S.P.H., et al., The Costly Consequences of Divorce: Assessing the Clinical, Economic, and Public Health Impact of Marital Disruption in the United States - A Research-Based Seminar, National Institute for Healthcare Research, Rockville, Maryland.
A 1991 study published in The Journal of Marriage and the Family found that ‘cohabitating unions are much less stable than (unions) that begin as marriages.’" Forty percent (of cohabitational relationships) will disrupt before marriage and marriages that are preceded by living together have 50% higher disruption rates than marriages without premarital cohabitation.
Bumpass, Sweet and Cherlin, The Role of Cohabitation in Declining Rates Marriage , Journal of Marriage and the Family, Vol. 53, 1991, pp. 913-927.
A 1992 Wisconsin study of more than 13,000 adults found that couples who had cohabited prior to marriage reported “greater marital conflict and poorer communication” than marrieds who had never cohabited.
Elizabeth Thomson and Ugo Colella, Cohabitation and Marital Stability: Quality or Commitment? Journal of Marriage and the Family, Vol. 54, 1992, pp. 259-267.
A 1992 review of ten cohabitation studies reported, “Those who cohabit prior to marriage have been shown to be significantly lower on measures of marital quality and to have significantly higher risk of marital dissolution at any given marital duration.”
Alfred DeMarris and K. Vaninadha Rao, Premarital Cohabitation and Subsequent Marital Stability in the United States: A Reassessment, Journal of Marriage and the Family, Vol. 54, 1992, p. 178.
Sociologists at the Universities of Chicago and Michigan explained that the “expectation of a positive relationship between cohabitation and marital stability…has been shattered in recent years by studies conducted in several countries including Canada, Sweden, New Zealand and the United States.” They continue, “Those who cohabit before marriage have substantially higher divorce rates than those who do not; the recorded differentials range from 50 to 100 percent.”
William G. Axinn and Arland Thornton, 1992, The Relationship Between Cohabitation and Divorce: Selectivity or Casual Influence? Demography, p. 358.
Sociologists at the University of Wisconsin-Madison agree: “Recent national studies in Canada, Sweden and the United States found that cohabitation increased rather than decreased the risk of marital dissolution.”
Elizabeth Thomson and Ugo Colella, Cohabitation and Marital Stability: Quality or Commitment? Journal of Marriage and the Family, 1992, p.259.
Drs. Elizabeth Thomson and Ugo Colella found that “cohabitation is associated with greater marital conflict and poorer communication,” ibid., p.263. This lack of communication and increased conflict contributes to the fact that “cohabitors perceived greater likelihood of divorce than couples who did not cohabit before marriage, and longer cohabitation was associated with higher likelihood of divorce,” ibid., p. 266. Research done at Macquarie University in Australia found that couples who cohabited before marriage were more likely to divorce than those who did not cohabit before marriage. Specifically, couples who lived together before marriage also “separated more often, sought counseling more often and regarded marriage as a less important part of their life” than those who did not live together before marriage.
John D. Cunningham and John K. Antill, Cohabitation and Marriage: Retrospective and Predictive Comparisons, Journal of Social and Personal Relationships, 1994, p. 90.
Dr. Jan Stets of Washington State University found that after controlling for other factors (gender, race, education, alcohol abuse, social integration, with whom one has previously cohabited, the length of the relationships, and the presence of children), prior cohabiting relationships negatively influence current married and cohabiting relationships.
Jan E. Stets, The Link Between Past and Present Intimate Relationships, Journal of Family Issues, 1993, p. 236,243.
A study published in the American Sociological Review found that for couples that cohabit with their future spouses, they explain: “Overall association exists between premarital cohabitation and subsequent marital instability. The dissolution rates of women who cohabit premaritally with their future spouse are, on average, nearly 80 percent higher than the rates of those who do not.”
Neil G. Bennett, Ann Blanc Klimas and David E. Bloom, Commitment and the Modern Union: Assessing the Link Between Premarital Cohabitation and Subsequent Marital Stability, American Sociological Review, 1988, p.132.
The University of California, Los Angeles, published research in The Journal of Personality Assessment, that looked at “problem areas” for married couples who did and did not cohabit prior to marriage. The study found the top three problems that distinguished pre-marital cohabitants from non-premarital cohabitants were drunkenness, adultery and drug-abuse (in that order).
Michael D. Newcomb and P.M. Bentler, Assessment of Personality and Demographic Aspects of Cohabitation and Marital Success, Journal of Personality Assessment, 1980, p.16
Brown University and the University of Michigan studying the nest-leaving process found that “only those leaving in conjunction with marriage were truly unlikely to return” to their parents’ home. However, “cohabitors were very likely to return home for an extended stay,” ibid. The study found 20 percent of cohabitants returned home and only 2 percent of marrieds returned. Goldscheider, et al. conclude that “it is difficult to argue that cohabitors resemble married people,” ibid., p. 695.
Frances Goldsheider, Arland Thornton, and Linda Young-DeMarco, A Portrait of the Nest-Leaving Process in Early Adulthood, Demography, 1993, p. 694.
A 1982 study by UCLA psychologists Stuart Perlman and Paul Abramson found that married couples are more satisfied with their sex lives than sexually active singles, partly because sexual satisfaction is enhanced by the “absence of sexual anxiety.” That is, part of the reason monogamous married couples are more satisfied sexually is because they are free from sexual fears like disease, pregnancy before marriage, being used, failure, and rejection. They are also free from the guilt associated with violating one’s sexual standards - a factor which has been found to hinder sexual satisfaction among unmarried college students, according to research by University of Connecticut psychologists Donald Mosher and Herbert Cross.
Stuart D. Perlman and Paul R. Abramson, Sexual Satisfaction Among Married and Cohabiting Individuals, Journal of Consulting and Clinical Psychology, Vol. 36, No. 1, 1971, pp. 27-32.