Sikorsky S-76 helicopter

At what point does a helicopter need two pilots? Or can they fly with one pilot all the time. I don’t know anything about helicopters. So there must be an very intelligent helicopter pilot that can explain this to me. If you’re around KANE or KSTP, I’ll buy you a cup of coffee. :smiley:
Thank-you

Well, you would need two pilots when you put the same message in twice.