Why does water roll off a person's skin when the person gets out of a swimming pool?

1 Answer
Suren Abreu
Oct 23, 2016

Because the surface of human skin has lipid molecules which repel water.

Explanation:

As in the saying 'oil and water don't mix', the surface of the skin has secretions which are lipid-based or 'oily'.

The molecules of lipids being no polar (no surface positive and negative charges), they repel water molecules which are bi-polar (bearing a positive charge at the Hydrogen ends and a negative charge at the Oxygen end.)

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