there are two ways to pleasure a woman.. one reaching her g-spot by penetration (best by doggy style) or her clotoris by lubricated rubbing which could be done while on missionary position. many think this as a boring formation, but this is the best way to pleasure her, as you can get to her lips and eyes and breast and at the same time, pleasure her g-spot (mostly inside the labia)... right on the top of the vagina towards the pee-hole (on the sides or on top) lies the clitoris, which must be rubbed during sex. if you are on doggy you are penetrating completely giving only g-spot pleasure which is more difficult to find, but women seems to love this because of entire insertion. To pleasure a woman even more, try lightly biting her region between breast and the underarm, or use vigorous tongue movement behind her ears. Another place which can excite her more is the neck region on her left where the arteries to the brain lies. tonguing this region and at times light bites could quicken her orgasm. Women can orgasm many times, so i suggest that guys ejaculate fast in the first try, then work the second time, because this time takes longer for ejaculation, giving women many orgasms, before guy gets his second.