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Let's see if we can tackle this question using proper terminology:

There is no such thing as a glass on glass bong. Virtually all glass bongs are glass on glass regardless of whether they use a ground glass joint or a gasket. The glass is touching the glass. The only bongs that aren't glass on glass are:
Metal on plastic, or
Metal on ceramic, or
Glass on metal

Google it.

Your glass joint is not frosted. Did you get a visit from Tony the Tiger?

Conically tapered ground glass joints. Inner (male) joint shown on the left and outer (female) joint shown on the right. Ground glass surfaces are shown with gray shading. By putting them together in the direction of the arrows, they can be joined, usually with some grease applied to the ground glass surfaces.

Lubrication and sealing


Grease is used to lubricate glass stopcocks and joints. Some laboratories fill them into syringes for easy application. Two typical examples: Left - Krytox, a fluoroether-based grease; Right - a silicone-based high vacuum grease by Dow Corning.



A rather thin layer of grease particularly made for this application can be applied to the ground glass surfaces to be connected and the inner joint is inserted into the outer joint such that the ground glass surfaces of each are next to each other to make the connection. In addition to making a leak-tight connection, the grease allows to joints to be later separated more easily. However, a potential drawback of using such grease is that if it is used on laboratory glassware for an extended period of time in high temperature applications (such as for continuous distillation), the grease may eventually cause contamination of the chemicals.
PTFE (Teflon) sleeves and PTFE sealing rings<sup id="cite_ref-0" class="reference">[1]</sup> are used in between joints to fit them together instead of grease. PTFE tape is another alternative that is finding widespread use.

After reading this entry from Wikipedia I'm inclined to try using a drop of olive oil. You could use WD40 or some other high-tech grease, but you might taste it if it drips into the bong.