The creative minds of the east gave us an image of Śhiva and Pārvatī as one person. One being. The image is Śhiva as Ardhanārīśvara - half man, half woman. On first seeing this image, its looks rather odd, especially as Śhiva is considered as the symbol of ultimate masculinity.
There are many interpretations of this image, one of them is that Ardhanārīśvara is just a symbol. A symbol of pure love. These lovers joined together and became as one, but on the surface, they always remained two.
An example that was given by Osho Rajneesh to explain