I have waist length hair for years and trim it very rarely. I also don't use heat or dye it so it's actually healthy (it would be even more if I cut it more ). I see older pictures and my head was fuller, my hairline was lower (by the way I am only 21). I think that the weight and the fact that they are caught in things make it fall more than shorter hair. What do you think? If that's true I'll cut it before I get bald lol.