Although a guy may never actually admit to browsing through a clothing related catalog, there is a breed of catalog which may urge the stallion to gently whisper: oh cool.
The attire presented to them will be suitable beyond the city streets. In Layman's terms we refer to it as stuff you wear outside. It's likely we have an natural urge to exist beyond air conditioned boxes. We cannot do this without the right equipment. Pre-historic man was all about the tools. Now the modern bloke needs the right threads from outdoor equipment retailers such as Kathmandu.
Just like the more attractive half of the species we need an excuse to buy gear that we are never going to use. The good news is that someone is having an easter sale (PDF) for another week or so.