On average, men cum about a teaspoon worth of semen per ejaculation, and can ejaculate about a handful of times (after that, it's almost dry-orgasming and can feel painful at the testicles).
So I've been reading that zinc can improve the semen amount, but there were more food supplements that have effect. And drinking lots of water. What's effective ?
Also, are there more methods to boost semen production ? Maybe bullshit, but testicle massaging ? Edging for hours ? Experiencing men-squirting ?
And oh, what about the reverse ? How is it possible to reduce cum ? Or even "hack" it to cum again and again without any actual semen shot out ? May prove interesting for using an onahole again and again without filling it with sticky fluids
