Frequent sex

Here I speak of those people, male, female or otherwise who have sex with many people wilfully, and who charge no fee for their services. Many people do this of course, and many of the same arguments for prostitution apply here; possible bad heath, for example. But can we, as a result, consider the 'sluts' (of any gender) to be immoral, that is, 'being bad'? Setting aside those who are, perhaps, addicted to sex, there are those who for whatever reason - perhaps nothing more than pleasure - who have sex often, much more often the average Joe. But here it is best to take a consequentialist approach. After all, do these people really hurt anyone? They may of course if they cheat on a partner, but for those who are single, and who have sex that often, lets face it, they don't hurt anyone. Bertrand Russell once said that it is the independence of will that is seen as as immoral. I agree with him on that, among other things, but appearances and reality may differ in more than an epistemological sense. I cannot see the 'sluts' of the world immoral for that very reason, that they do not hurt anyone. It is an accepted rule, thoughout most Western culture, that if one hurts someone they are bad. Of course, it does not follow that as frequent sexually active people are thus not immoral, as they could be breaking other general rules, but again the religious aside, they are wilful people not massively harming their health who derive pleasure from their antics. So how can they be 'being bad'? I don't know, although of course the cynics among us may just point out that I'm bound to this conclusion, I am male after all.