"Cowper's gland secretion" called "pre-cum" might ooze out of the end of your dick. It's whitish, slippery, and perhaps a little bubbly due to all of the action going on from your hand. Some guys can actually get enough of this fluid flowing to use it for lubrication.
John doesn't need to use vaseline or lotion to jack off because he has "natural lube"
A brass-colored mineral, FeS2, occurring widely, used as an iron ore and used in producing sulfur dioxide for sulfuric acid. Also known as fool's gold because it looked like gold and people used to think it was.
When the miners struck the jackpot of pyrite they thought it was gold, they tried to sell it for big bucks and then it was tested after bought from them, and then the miners were shot by the buyers.