Women often have difficulty achieving orgasm while in the “missionary position.”  It is thought that this is due to the decreased contact with the clitoris.  A technique that works well while in the missionary position and helps to increase the chances of orgasm is called the “coital alignment technique.”

The technique is as follows: the man is on top of the woman with his pelvis low on her pelvis.  His legs are between her legs.  He’s propped up on his elbows holding his weight off her chest.

Next, the man slides forward a little so he’s higher up on the woman with the base of his penis in direct contact with her clitoris.  He then lowers his chest, resting on the woman.  They then begin a rhythm upward and downward stroke of approximately 2 inches.  This movement should be neither too slow nor too fast.  Movement is continued constantly in a slow rocking motion.  The steady rocking of the penis in the vagina with the top of the penis stimulating the clitoris leads to orgasm.

Want to read more: 

The Perfect Fit: How to Achieve Mutual Fulfillment and Monogamous Passion Thru the New Intercourse by Eichel and Nobile.