Why do Mexicans lie a lot?

Okay I date a Mexican and we just left Mexico from visiting his family. Not the whole Mexican culture lie entirely some has learn to trust people. I never heard a girl lie but a guy got it going on with lying they got it down packed. When we was in Mexico visiting his family I would be honest and they would correct it with a lie I would laugh. my boyfriend would lie to nearly everybody but I never failed for defensive mechanism. He felt more of a man when he lied because he wanted to avoid trouble. With me at first he would constantly lie and I will not fall for it or take guilt trips. He loved easy females but he told me at the beginning we was not gonna date and he really couldn't stick to none of his stories because the more I didn't fall for lies as a woman he liked me more. I had to literally jump on his case everyday about lying then finally he agreed to go to counseling. He say he didn't trust nobody other than family at first. But I'm proud to see many Mexicans are coming out of their old culture
Why do Mexicans lie a lot?
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