Since 20 - 25 percent of the population has HSV it's likely that two
or three of any ten people have the disease.  Figuring the odds
beyond that gets a little tougher.  And most people with HSV don't
have recognizeable outbreaks, but that won't affect your odds of
catching it.

One things for sure, the more people you have unprotected sex with,
the more likely you'll wind up with HSV.  The number of sexual
partners is a very high risk factor.

If you've had sex with ten different people it's probably time to go
get yourself checked for lots of things.  ;-)

Just to be safe.

Take care,

Mike