Why Cancer is unfaithful?

Very sensitive and emotional, it is not easy for Cancer to devote to a superficial relationship because he seeks depth and security in love.
He is fond of the principles of home and family and it is hard for him to put them aside to be open to new and unfamiliar experiences.
As the crab with its claws he clings strongly to his prey at the same time that he comes with all his affection.
Cancer are jealous, possessive and they suffer in silence.
Tip: Say “I love you” often.

What is the most unfaithful zodiac sign?