Yeah Asia is an interesting one for this. In Japan at least they eat a tonne of fish and seaweed which has a lot omega 3 which is really, really good for sperm so maybe there’s other factors.

Like I’ve said on other comments. When you’re in the situation of having to figure it out, it’s simpler to just blanket cut out anything with any evidence whatsoever. If it improves your chances 1% then it all adds up.

Plus soy isn’t even that great tasting. You aren’t gonna miss it!