i think its neandertal genes + lack of core training + liposuction.

He's probably done less that 1000 situps in his lifetime. Liposuction pulls fat from the surface but not the fat surrounding organs.

Neandertal skeleton for reference:

Just remember that for a narcissist, any attention is good attention.

His nipples are halfway down his bicep. Does he even lift?

So the cybertruck is the vehicle version of musk? Got it.