What is the difference between pansexuality, polysexuality and bisexuality?

All of them are under the same umbrella. Pansexual is being attracted to all genders, Bisexual is traditionally being attracted to two genders, and polysexual is being attracted to two or more. But of course, each one can be manipulated to suit you. In my case, I was taught that Pansexual is not having a preference, but then bisexual is having a preference between genders. But of course, you don't need to go off. Many people have their own idea of what these sexualities mean. You just need to find one that you identify as, or you don't need a label it's all up to you.