There are things books cannot teach...one simply needs to practice and experience them to master them. Sex is one of those things and hot librarian Nadia Bella uses every opportunity to practice the art of erotica...and it is safe to say she is on an advanced level.
Video from Nadia Bella in 21Sextury (Practice Makes the Master)
Pictures from Nadia Bella in 21Sextury (Practice Makes the Master)