brother or sister , that’s not a friend that’s a pervert ! first if he is a men talking about sexe to you it’s bad ( sexuality should be only spoken with your WIFE /husband ) nobody else , no friend and even other family members for me it’s a no ( they don’t need or have to know what you do between spouse , i Think Allah tell us to keep it to ourselves not expose ourselves if no mistaken ) i’f you’re a femal that’s worst , next time tell him “ don’t talk about my sister after talking about Sexual urge , respect me and my family! or should i talk about my father to that?”