to this:

A friend a few months ago found a cream with seafood sperm. And since then, every time I see him, my mouse is ripped in parts of my thoughts: WHAT??? How are they produced on an industrial scale? Should they show him naked eggs or chew him for needles?

All is simple. A potassium chloride solution is infused, and he immediately throws out the sperm. Or caviar, if a female. This also works with sea stars, double-stranded molluscs and other animals with external fertilization. A marine biologist.