Milk of magnesia is a saline-based laxative that can treat constipation, as long as there's no indication of a bowel obstruction. The saline in the milk of magnesia works like a sponge when it hits the colon, drawing water into the area to soften the stool and ease its passage.
Floating Eggs. Eggs can float in water when the air cell has enlarged enough to keep it buoyant. This means the egg is old, but it may be perfectly safe to use. Crack the egg into a bowl and check for an off-odor or unusual appearance - a spoiled egg will have an unpleasant odor when you break open the shell, either when raw or cooked.
Poop (feces or stool) floats because of an increased content of gas or water (or both). This question was addressed in a prestigious medical journal, the New England Journal of Medicine (May 4, 1972) by Dr. Michael Levitt from the University of Minnesota, who is an authority on intestinal gas. To float, stools must contain gas. Whether the stool is a floater or a sinker depends upon differences in gas rather than fat content. A high stool gas content (and hence a floating stool) is related to gas (methane) content. Thus, stools float because of an increased content of gas or water (or both). There is nothing wrong with floaters.