Help with biceps

[svarddre]

I’ve always lacked this line despite having big arms. Don’t tell me it’s bc I’m not lean enough I have visible striations in my shoulders and triceps. Is it a mass issue on the short head of the muscle?

 

[-=t3rm1n4t0r_2005=-]

genetics insertions probably

 

[paxo]

Yh this is genetics