Sandow said:
I think the idea behind the foot massage is that your increasing blood flow to her extremeties, or just blood flow in general. Studies are easily skewed, I don't believe this actually makes any significant changes at all. If it does make a difference its most likely very very small.
Actually, there is a very good scientific explanation to this. It has to do with the brain and how the areas that process touch are laid out in your brain. Each part in your body has a brain area designated to process the sensory information. Not sure about the name, but the brain areas responsible for your feet and genitals are on the extremities of the right side of this 'strip'(It's a linear area running front to back). The feet are the most right area, and the genitals are to the left of it.
What happens when you give a girl a good foot massage? You overload her brain with sensory information(feet are extremely sensitive), which leaks out to genital area and thus influences that area indirectly. This works both ways, I've had orgasms so intense that I could feel it in the soles of my feet. So if you really want to give her a great orgasm? F*ck her senseless, and when she's about to orgasm, start massaging her feet and keep on f*cking. I've had girls go spastic so intense.