In fact, it is so bad, that there's a special program within Health and Human Services called "IPP" (Infertility Prevention Program) which has a primary focus of preventing STDs from causing infertility. See, some folks have so damaged their reproductive organs through STD infections that they are becoming sterile.
Again, 19 million a year...out of a population of 300 million. Doesn't take too many years before every orifice in the US is infected.
Like Neo said...all you can do is take a leap of faith and hope you don't get anything...along with worrying about pregnancy, psycho disorders, other lies being told to you...Yeah "making love" is a real obstacle course these days :)