The prevalence of moderate-to-severe ED varied significantly by age for each race/ethnicity group (Figure 1). Moderate–severe ED was found in 28.2% of white men, 31.5% of Hispanic men, 33.2% of black men, 26.8% of Asian men, and 31.7% of other men (Table 1).
Perhaps erectile dysfunction is inversely proportional to the volume of blood required to fully inflate the penis....
...since we’re doing a mash-up of trolling and sciencing...
Moderate–severe ED was found in:
33.2% of black men
31.5% of Hispanic men
28.2% of white men
26.8% of Asian men
"Conclusion: The average of fully stretched penile length in normal potent men is 12.9 cm, whereas the patients with ED tend to have significantly shorter penises (11.2 +/- 1.5 cm)."So, does seem to be quite likely to be a hydraulic issue. Larger tanks require more work from the pump.
Or insecurity issue"Conclusion: The average of fully stretched penile length in normal potent men is 12.9 cm, whereas the patients with ED tend to have significantly shorter penises (11.2 +/- 1.5 cm)."
First study on google. Hormone issue?