The guy is a very mature person, very smart, talented and very attractive. Definitely not someone who has only his penis to brag with. He's actually not bragging for any of his major talents. Just not that type of person.
But! I can see that he wants to get my attention on his penis, who's obviously remarkable :) He's a musician and I'm often part of his show's rehearsals, so he would invite me
in the dressing room to talk about work not when he's shirtless (he gained weight), but exactly when he's about to put his pants on.
And once he made a hint with a song, referring to his penis size.
Opinions?
Oh, and he would also play on his guitar for me only, so I guess this is the same type of bragging.