Boys are interesting creatures. And they seriously come in all shapes and sizes. Internally and externally. Though what I found common in many guys is their love for music, or their love of trying to be someone through music.
Sorry if I'm generalizing, and maybe its the guys in my circle, but you don't generally see girls playing the guitars in parties and trying to impress everyone with their music skills. Okay girls try to impress everyone with other skills I know but still..
You can learn a lot about guitars if you have a good friend who is obsessed over it. Like for example if there is a fender starcaster for sale, you'll know about it because the friend might want to drop by the shop immediately. Or if you want to buy a present for that friend of yours.