time and I have never ever heard this startling bit of news. So, getting on the internet, I thought that I would see if she was full of what the cows leave behind or on drugs or something and I see that it is a quite an ancient myth that many people still believe in. To quote one of hundreds of sources: Myths about hyenas originated from confusion about their sexual activity. Male and female mate just as other mammals do, but male and female genitalia are quite similar in appearance. One theory holds that the female has a large amount of male hormones to increase her aggressiveness. Whatever the biological reason, the confusion inspired claims that hyenas could change sex at will. So, printing off a few sources and giving her the facts, she still insists that that is what she saw on the Discovery Channel and she stands by it. Has anyone else see this show on tv or should I just give my mother a great big hug with a long-sleeved white canvas coat?