Why does my skin so easily imprintable?

Whenever I wear anything or lie down on a carpet or bedspread, my skin picks up the pattern of whatever it touched. A friend of mine can even leave her fingerprint in my skin!! If I were to lie on the grass with anyone I know, I would be left with marks all over my legs while the person with me wouldn't have any! Am I dehydrated? Or perhaps my skin just doesn't retain water like other people?