haha now you are making me feel all experienced b/c I know more then you in this area lolz
well anyways pre cum is when little bits of sperm ejaculate, I have no clue what causes this but it happens and is supposably pretty common.
oh ps not experienced in this area, I have just read books about health, and paid attention in health class
It's meant to be a lubricant and to neutralize any acid in the urethra so that the sperm isn't killed
btw it tastes gross but im not sure if thats all boys or just some