Missionary position might sound clean and right, but the plain fact of the matter is that you have a hard time getting in touch with the female g-spot in this position. This means she’s not got much of a chance of reaching an orgasm with this position unless she has had a large amount of stimulation beforehand; enough to put her almost to orgasm by itself.
Some women won’t be able to do this position because it feels uncomfortable for them however most will not only be able to do it, but enjoy it immensely. Many men find this position an extreme turn on. In this position the woman can control depth, intensity, and speed. She can also tease by not moving and drive the man crazy.
In this position, both parties can share control of all aspects and the woman can move her body in order to guide the man’s penis exactly where she wants it to be. The man can do all the work, or the woman can do all the work, or it can be shared. She may even drop down to her elbows rather than hands.

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You may not know as much as you think. Many men believe their wives are happily enjoying orgasms during their sexual encounters but many women are doing nothing of a kind. If your sexual encounters consist of:
In all probability, if the intercourse was a short period and there was little or no foreplay, your partner is not having an orgasm. She may be excited and she may be enjoying the intercourse, but it’s not likely that she is actually having an orgasm.She may even be faking one in order to give you full gratification, however, she is still not likely having one herself.
During sexual intercourse alone, the simple fact is that her clitoris does not receive enough stimulation to build up to an orgasm, and because she is more emotionally based, her emotions also have to be onboard.

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Female ‘ejaculation’ really isn’t that different from male ejaculation in feelings and sensations. It will take a woman longer to get to that point because she is more emotionally based and needs more emotional stimulation as well as physical caressing and ‘foreplay’. If a woman does not have any moisture in her nether regions she is not ready for the next step.
Arousal for a woman may take longer and intercourse may need to last longer for a woman to orgasm than for a man, but the feelings are very similar in nature:

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