Choose an immovable surface — a strong headboard or the side of a tub if you have a spacious bathroom. Lie on your back and raise your arms overhead so your palms rest flat on your surface of choice with your head several inches from the tub or the headboard; it’s as if you’re reaching for the sexual stars. Once he enters you missionary style, bring your legs together as close as possible. With your thighs pressed tightly, his penis will rub against your inner thighs and labia each time he thrusts.
By holding yourself against that hard surface rather than moving with him, you create even more friction. Combined with your closed thighs, the immobility of this position makes for deeper penetration — a big plus for you. For him, the illusion of resistance will heighten his arousal