Bedroom advice needed

Katie
I've been with my boyfriend for over two years, and our sex life has never been boring! My boyfriend mentioned to me yesterday that he would like if i learned how to move my lower body (my hips) without having to move all of my upper body!! I need help asap. How do you guys learn to move your hips? Also he mentioned I should give him certain looks during intercourse. Any advice on moving my hips, or how to give him sexy faces during sex would be awesome. Thank you!!