falling in dreams?

Question

EVERYONE i know has had a dream where they were falling from a great hight, and it felt like they were falling. i never have. honestly, NEVER in my twenty years of sleeping and dreaming have i EVER had one. i remember my dreams exceptionally well because they tend to be rather strange, but i cant remember a single dream where i ever fell, even a small fall like if i tripped over something. so my question is...what do dreams of falling mean? and is it weird that i have never had one? because seriously EVERYONE i know, or have asked about this face to face has had one.