Some people come by their people skills naturally.
They just intuitively know what to say to everyone so that the message and feeling are well received and produce the effective they desired. Others aren't so naturally gifted. Unless you happen to work around people with almost identical personalities to yourself, odds are you weren't born with natural people skills. Your ability to acquire professional, and considerate, people skills will have a tremendous impact on your career achievements. Trust your co-workers actions and deeds.