doing some research, it seems that the more the g spot muscles and such are stimulated the stronger the potential climax. the link provided at the bottom has g spot exercises for the ladies. imp:


There is a spot inside the vagina that is extremely sensitive to deep pressure. It is felt through the anterior or front wall of the vagina about five centimetres from the entrance.

The spot is called the G spot or Grafenberg spot after the first modern physician to describe it.

When properly stimulated, the G spot swells and leads to orgasm in many women.

It is probable that every woman has a G spot. The researchers found one in every woman they examined. "It is the homologue of the male prostate," they said.

At the moment of orgasm, many women ejaculate a liquid through the urethra that is chemically similar to male ejaculate but contains no sperm.

As a result of stimulation of the G spot, women often have a series of orgasms.

For many women, it is difficult to properly stimulate the G spot in the missionary position. Other positions such as the one with the woman sitting astride on top or the one with male entry into the vagina from the rear ("doggie style") work better.
http://www.tantra.co.nz/tantrahome/gspot/index.htm