Why are fats hydrophobic?

Fats are hydrophobic because they are composed primarily of long hydrocarbon chains, which are nonpolar and do not interact favorably with water molecules, which are polar. This nonpolarity prevents fats from dissolving in water, leading to their characteristic behavior of repelling water. Additionally, the molecular structure of fats, including triglycerides, lacks charged or polar functional groups that could form hydrogen bonds with water, further contributing to their hydrophobic nature.