There is obviously a certain degree of risk, as no means of protection is absolute, but barring not using various means of birth control properly which is usually what leads to the 1% discrepancy, then who cares?
Getting laid is really fun, otherwise people wouldn't do it and while reverting to the 60s and screwing everything that walks is probably not the most advisable move, getting laid on a regular basis is healthy for you, and those who look down on those who sleep around a bit are probably repressed or something.
So I guess I don't really care. Unless you are banging half of New York, or are Gene Simmons or are sleeping with a dangerously absurd amount of people, then there really isn't much to talk about. I honestly think if we could get over this puritan "we need to be committed to one person forever" ideal, the world, or at least a ton of marriages, would be better off, but that is just me. If practical life experience is meant to teach us, how is being with one person forever going to help with that?