Why do some men make enough precum to never need lubes during sex, and others make little or none at all?

Question: I'm one of the guys who has never had to buy a bottle of lube in his life. But I've been with other guys who seem to have no precum in them at all. What's that about?
Answers:
Biodiversity

Other Answers:
Practice makes perfect

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i heard that porn star men take zink supplements to beef up the volume of ejaculatory fluid. i imagine other factors also figure in: how exited or turned on he is or dehydration

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I think it a mine thing

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