Why Gemini is unfaithful?

It is difficult for Gemini to be faithful because he is a curious boy who loves to discover new experiences to have fun.
It all starts with an innocent and friendly conversation and then, like playing, he can start an affair for the pleasure of the exciting and fun.
He rarely get emotionally involved.
It is his main flaw: he does not realize that he can hurt another in his carefree actions.
Tip: Keep his interest awake.

What is the most unfaithful zodiac sign?