Why do little girls like pink ?

Probably because of social pressure. In Britain and the USA, older girls like pink more than boys do, but they could already have been influenced by expectations. So studies have tested one- to two-year-old's by using the ‘preferential looking task’, which measures what the children like to look at the most. The studies found that preference for toys differ by sex, with boys looking longer at cars and girls at dolls, but preference for color do not. So perhaps it’s not surprising that back in 1918 the trade publication Earnshaw’s Infants’ Department wrote that babies’ clothes should be pink for a boy and blue for a girl.

Why do we have moles on our skin?

During the first 12 weeks of pregnancy, the developing fetus is making melanocytes – the skin cells that produce ordinary skin color. These aren’t always evenly spread out: random areas will acquire a cluster and during your life, these clusters can grow into a mole.

Moles are quite different from freckles. Almost everyone has from 30 to 60 moles on their body, but freckles only occur in people with certain genes – particularly the one responsible for red hair. Freckles also need sunlight to trigger them, while moles appear spontaneously.