Why would a supervisor at work ignore a female employee?

He is warm, charming and always likes to meet new people but with me he is always cold and short and never talks to me even though he is supposed to train me. He even talks more with coworkers he doesn’t work with directly than with me. When he sees me he just looks past me or gives me a fake smile or slightly disgusted look. What could be the reason for his behavior? I was always polite to him and his colleagues get along with me. Once I even overheard someone pointing out that he never talks to me

Why would a supervisor at work ignore a female employee?
Post Opinion