For my own statistical results (those male i know under my group), less than 50% been to prostitutes.
But funny is that, for those who went to prostitutes'are those who are married.
In conclusion, those who has not married need not to go to prostitute, coz they probably got it free or they find SP, and those married ones go to prostitutes bcoz paying to get sex is the fastest way and easiet way to release.:-P