Missionary Position. There also has to be trust and a fair amount of familiarity between the two of you so giving directions and being sensitive to their reactions and movements would come easy. If you want to make eye contact and get a view of her from the front, doing this in front of a mirror could turn up the heat a little bit. If you have a foot fetish and want to suck her toes, go for it! If your woman is especially sensitive down one side of her vagina or clitoris, she may prefer one side over the other.
20 Oral Sex Positions You Need in Your Life