Two things that made this room masculine: that beautifully textured rug and the upholstery. The white bedding linen works in a room full of textures (wood, carpet, etc), whereas a colorful sheet works best in a minimalistic surrounding.
A rustic male bedroom makes a class act design statement in a loft apartment, using split logs for one wall and combining a deer head with a faux fur throw over the bed clothes. Kind of a sexy male with a come hither look. :-)