Because the clitoris and G-spot are anatomically part of the same neural network, stimulating the two simultaneously often produces a more intense and different sensation than either alone—this is often referred to by sexologists as a “blended” or “double” orgasm.
How it works in practice One hand (or your partner's hand) continues to make an outward circular motion on the clitoris, while the other finger applies pressure from the inside to the anterior wall. Coordinating both at the same time takes practice—it's not uncommon for the first few attempts to maintain a rhythm to be difficult.
The role of postures A prone position (woman on top of her partner) is often the most convenient for this technique — the woman can control the angle and pace, while the partner has a free hand.
Toy Help Today, there are dual stimulators designed specifically for this purpose, which act on both zones at the same time - useful for those who have difficulty with hand coordination.