Dude design, otherwise known as the man cave. What makes a home decidedly manly? Nothing per se. It certainly doesn't make you more of a man to choose one design aesthetic over another, but there is such a thing as an unequivocally masculine look.
Here are a smattering of hunky rooms that say "a guy lives here."
(Images 1 casaCARA; 2 Tom Ackerman Photography; 3 Architect Vincent Van Duysen's home in Vogue Living Australia; 4 Thom Filicia's apartment in Loft Life, photographed by Tom Ackerman; 5 Material Girls Blog; 6 well-plaid; 7 Ralph Lauren Home; 8 Spy Vibe)