question about thick skin

[toughguywannabe]

is having skin that seems thicker basically just having a high bf? or is it genetics?

my skin is pretty thick but i think it's b.c my body fat is around 20% but if it's genetics does that mean my skin will never be as thin as some body builders? my older bro has some pretty thick skin too he says he's under 10% bf and he has a clean 6 pack but he can still pinch off a good amount of skin off his arms.. while some ppl who aren't as lean as my bro can't barely pinch any skin off their arms.. im not really sure where im goin with this so im jus goin to end it now..

[toughguywannabe]

anyone???