Not all guys talk about their clothes. Most, like me, stay mute unless the item in question boasts a cool fabrication detail akin to a Porsche’s flat-six engine. But when offered the chance to try a purportedly ultrasoft 10% yak wool shirt, I immediately sensed conversational possibilities. When it comes to droll exchanges, the only words funnier than “yak” are “crumpet,” “Kalamazoo” and “marzipan,” though, these days, relatively little menswear is constructed from crumpets or marzipan.