Past Experiences

Proverb: "One, with his mouth burned from hot milk, eats yogurt by cooling it down." - A Turkish Proverb 

Original Form: "Sütten ağzı yanan, yoğurdu üfleyerek yer."

Description: The proverb refers to a person showing unnecessary graveness to everything due to past experience of a big fault. 

Thanks to r7raul for the idea of presenting Turkish proverbs..