The quality of sperm from men in North America, Europe and Australia has declined dramatically over the past 40 years, with a 52.4 percent drop in sperm concentration, according to a study published Tuesday.
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I used to think that might vary depending on who is in the body and what gender they truly have etc
I do not know anything about these things.
Passion and da groove I believe it can improve but maybe it depends on who , why ,what for, when etc
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Teen pregnancy and birth rate is on the rise but sperm count is lost by 50%. Makes alot of sense? 
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Because men drink alcohol which is not good, and they smoke cigarettes which are also not good for the quality of sperm i think but it’s just my opinion
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Yes, and also air pollution has increased in developed countries, especially USA or China…
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