New Delhi, Nov. 2 -- Tesla CEO Elon Musk and podcast host Joe Rogan discussed billionaire Jeff Bezos' physique, joking that he might be "partially taking some testosterone injections." The 61-year-old Amazon founder was scrawny when he launched the e-commerce platform in 1994. Nearly three decades later, the billionaire appears impressively muscular.

"The 61-year-old is definitely doing some testosterone," Rogan, 58, claimed on his podcast on Friday. "He looks jacked-quick," Rogan added suggestively, with Musk laughing and repeating the word.

Musk, 54, remarked that Bezos "went from pencil-necked geek to looking like The Rock."

"Like a little miniature alpha fella," Rogan added.

"Like his neck got bigger than his head," Musk continued...