Personal Preference: Lots of people think it's gross to eat a muscle or organ from an animal, but enjoy milk, cheese, and eggs. This may also include moral reasons about the animals.

Health preference: Some believe a vegetarian lifestyle is healthier, since it may reduce carcinogens associated with meat consumption while maintaining more protein options.

Health Limitations: some conditions such as gout, allergies, and tick-borne diseases make it difficult or impossible for some people to maintain their health on a meat diet. But eggs, cheese, and milk may still be an option for them.