Why are endangered or traditional medicines ALWAYS considered also an aphrodisiac?

whenever you anything about people harvesting something endangered or anything used in traditional eastern hollistic medicine, they have their independent claims of different uses they are used for. however, EVERY LAST SINGLE THING endangered and/or used in traditional eastern medicine for reason ALWAYS also are said to be an aphrodisiac. How the heck could people believe that ALL those things are also aphrodisiacs? If ALL of those things are considered aphrodisiacs, then surely the air I breath and plain distilled water must be aphrodisiacs too?!?!?