Forbidden fruit tastes best.
More Czech Proverbs:
What is called into a forest is the same what is echoed from the forest.Czech
A good neighbor increases the value of your property.
Czech
A custom wears a shirt of iron.
Czech
Many a friend has been lost by a jest, but none has ever been got by one.
Czech
When the fool knows when to be silent, he would be sitting among the wise.
Czech
He who is not lazy shall get much green.
Czech