Cuckold's Primal Instinct

Your primal instinct prepare your cock and balls to fuck and cum inside me. This is what pushes your lust, your desire to fuck me. But why do women choose some men over others? Why do you end up as the cuckold? Natural selection, you are not what I want or need. My lust turns you away, because you are not what my body wants. He is, that man that I fuck.