My gf likes it a little rough. That's just fine with me but I also like to indulge in foreplay for a while. How can I introduce and keep that slightly physical and rough side to our foreplay? What she calls definite loving - where we are more physical and definite than gentle romantic enjoyment. Where I can keep her guessing as to what might happen next and leave her in no doubt that I am calling the shots. Any helpful tips are gratefully received.