Learn the 13 shocking signs he just wants sex, so you know what to watch for to sidestep men like this. Are there signs he just wants sex? Why do men lie? If they are not into you for more than just a date, why lie and tell you they like you or act as if they like you. Is it that hard to act normal? Do guys never think about being honest? Please help me understand because I am often heartbroken and left feeling so sad and very confused.