It is a lubricant intended to prime the man's plumbing ready for ejaculation (by counteracting any acidic urine, which will damage the sperm) as well as to lubricate the penis to aid penetration. read more
Leak is normal – Men will release precum and there's no reason to be concerned, it's normal. This is a natural occurrence to help lubricate during sexual intercourse. Precum is secreted during arousal or foreplay. Where the actual orgasm release is milky-white in color, precum is a clear fluid. read more
Men vary in the amount of pre-cum they produce, from none at all, to just a drop, to a significant release of fluid, all of which can be normal. Age, intensity of sexual excitement, and duration of touching can all affect amount of pre-cum. read more