Improving the missionary position.

Get higher. By placing a pillow under the buttocks, you thereby slightly change the angle of penetration - it will be deeper, and therefore will give new sensations. Move your hips. By squeezing your legs, you will make your pelvic floor muscles tighten, and his cock will be able to stimulate your clitoris. Look at him. The missionary position is also good because it can give lovers that intimacy that will never be, for example, in doggy style.