Looking into it seems that "Cum Lube" is likely K-Lube since J-Lube goes bad relatively quickly. That said, if the lube is going inside someone, it seems like J-Lube is a much safer alternative.
TIL. Thank you for the search prompt kind stranger.
xLube is pure polyethylene oxide, kLube is xLube with preservatives, and jLube is kLube with a bunch of sugar for some reason! I use xLube personally, if you make it with bottled water it can last a month or two.
Nope! jLube is the only one with sugar. I'll post a picture of my xLube container in a sec. kLube I don't have personally,but it doesn't have sugar to the best of my knowledge which is pretty good