A recent study interviewing 700 men that pay for sex with prostitutes uncovers emabarrasment, shame, guilt and dissatisfaction from many of the men... "unfulfilled, empty, still lonely". One third of the men admitted to knowing that the women had been trafficked from other countries and half understand that these women are mistreated by their pimps. Another study done in 2005 discovered that the number of men paying for sex with prostitutes has doubled in the last decade. Only 6% of the men interviewed had ever been fined or arrested for soliciting prostitutes.
See article:
http://www.guardian.co.uk/society/2010/jan/15/why-men-use-prostitutes