Flexing Beauties

Admittedly there'll always be something about a guy showing off that I'll find incredibly hot. Maybe it's the self-confidence, or maybe it's just the intrisic nature of the male body that makes a lean and/or well-toned physique so attractive. Regardless, as cliché as it might sound, if you got it, might as well flaunt it...

I wasn't aware an 8-pack was humanly possible. Is this a case of an incredibly disciplined work-out regiment... or should I just chalk this one up to genetics?