They actually both contain glygerin which is a form of sugar.  Not so good to put down there, especially if you are prone to yeast infections.  Warming lubricants are also not recommended because they can cause numbness if used too frequently.  If using a lube, it's best to stick to non-glycerin types such as Sensual Power, Slippery Stuff for light play and for all purpose use including anal play, Maximus or Liquid Silk.  They tend to be of thick consistency and are glycerin free.  Astroglide and KY are definitely at the bottom of the list but are more widely available hence their popularity.  There are, however, much more quality lube out there as I suggested. I would  stay away from warming lubes

...is the hot temperament of my wetness alone. Who needs lubricant when your sexually aroused?

sting, they sting
ouch

Perhaps this burning might be a problem if one is high volume provider.

-- Modified on 7/6/2006 4:58:58 AM

a sample of  Nymphos Desire    Thought it sounded pretty hokey till I tried it. Warms great without burning and even tastes like strawberries. So far every lady has liked it.