Why are excess fat soluble vitamins more likely to cause adverse effects then water soluble?

triglycerides, (fat) are extremely long chains of hydrocarbons which are non-polar molecules, water is an extremely polar molecule and there is just so much of it and it is constantly moving throughout the circulatory system, where as fat doesn't move much, it just sits there and the vitamins take longer to dissolve causing the side affects to last longer.