Currently Astroglide, though that seems to be not as good for some reason...age of product or transferring to a different bottle..not sure.
Have in the past used spit, vaseline (sp), hand and body lotion (very convient to clean up, just rub your hands someplace under clothing into your skin then rub your hands together, anyone ask, you put on hand lotion because your hands were cracking (due to a soap allergy), liquid soap, bar soap, engine oil, nothing,butter/margarine,cooking oil, shampoo/conditioner, KY, KY warming gel, pee, baby powder, medicated powder (it would tingle when applied)??, silicon lube (too gelled, wasn't good), used some toothpaste but since it is thick just a little, wanted to see how the minty flavor felt on my cock, would love to have tasted it also, a condom (lubircated), I am looking at all kinds of gases/fluids/solids/semisolids as I run across them in life. I think to myself if it would work. I do the same thing with objects that I could put my dick in, I consider myself quite imaginative and horny enough to keep looking. I have ideas for sex toys but how do you market that type of thing?
Hope I haven't broken any rules here!