Symbolic proportion is when you use another item to explain what something is to someone. For example, you might tell someone an old Nintendo game looked like an 8-track tape.
Mineral oil is used to treat constipation. It is known as a lubricant laxative. It works by keeping water in the stool and intestines. This helps to soften the stool and also makes it easier for stool to pass through the intestines.
Use olive oil for its nutritional value. When you need to relieve constipation, mineral oil is a better choice than olive oil, which has a mild laxative impact, if any. You'll also get a lot of calories if you try to use olive oil as a laxative, compared to zero calories in mineral oil.