No, porn is NOT the right way.
For example in porn most women are exceptionally sexy. If they weren't the porn wouldn't sell.
Simple as that.
Ditto with the studs. In porn most men are studly AND well hung! If they weren't the porn produced won't sell.
Porn is good for a jerkoff, but it isn't accurate for what's really out there.
Most men have about a 5" penis. Some shorter, some longer. Be they dark skinned Africans or pale skinned Euros or North Americans. Don't look to porn as a guide to what's out there.
There are global studies that show this. Eg look at wikipedia, or that British Journal of Urology. They did a global survey of Urologists in late 2014 (including African Urologists) and averages are the same around the world.
Skin tone, or culture, or nationality, or hand size, or feet size, or face, nose, etc, has zero correlation with penis size.
Skin tone contrast between a dark skinned lover and a pale skinned lover can look sexy to most, but outside of porn there is very little indication that the male will have a larger penis.
Don't get me wrong. Men with large penises exist in all 'races'. But so do men with small penises. They too exist in all societies.