People who have photographic memory or who can remember seeing things and then masturbate over the memory of visual image they have stored in their mind. People who can do this may store multiple memory / images in their mind, and keep a collection virtually in their mind.
Seeing a nude woman on a beach, and later on masturbating over it or something else stored in their VWB (Virtual Wank Bank).
by Matdragon October 7, 2010