Both women and men lie. It is human nature to do so. It seems to me that you are a woman who got cheated by a man, and so, now you think all men are cheaters and liars.

Because women don't trust men (Dado que las mujeres no confían en los hombres) That will make them not trust you even more.

Because women don't trust men (Dado que las mujeres no confían en los hombres)

Well, the question should be "Why do men tell so many lies?". The use of "tell" rather than "say" is just because it's a fixed phrase. Other examples are "story", "time", "truth" etc, for these we also use "tell". The answer should of course be "Honestly, we don't"... but maybe that's also a lie ;)

Because, it's all apart of their game plan.