That's because the pH of human body is different. Most of us are slightly acidic and a few are weakly alkaline. ChristianRandPhillips is a special case. She happens to be neutral and can be distinguished by body fluids, specifically sweat. The smell she gives off is sweat.

Moreover, there is no difference between fragrance and odor in essence, just a matter of concentration. Many spices used to make perfume smell bad directly, and will give off fragrance after dilution. So don't envy ChristianRandPhillips, because she is more dangerous than us-she is likely to stink when she gets old! *^.^*