When you think of who you could switch with, you decide the first thing you think of is as good as any. Your best friend, Paul, easily comes to mind. If this really works, wouldn't it be better to test it with someone you trust? If you need to, you can always give him a call, and if it doesn't work you can get on with your day.
Paul is a smart guy, and his sense of humor is what made the two of you friends. You're gay, and while you're not interested in your best friend, you naturally notice certain things about his appearance. While your friend has a winning personality, he got the short end of the stick in a few physical ways. You feel short sometimes at 5 foot 8, and he's a few inches shorter at 5 foot 6. He's a little on the chubby side. You aren't a great example of fitness either, but you go to the gym a few times a month to keep your tiny beer belly at bay. Paul is not exactly unkempt, but he could probably go to a barber and update his clothes a little more often. He usually sports some stubble, and from what you've seen at the pool he's a pretty hairy guy, made all the more noticeable by how dark his hair is. He has a pretty handsome face and an easy smile which get him the occasional girl from what you understand.
Pulling yourself back to the present moment, you use your thumb to spin the ring on your finger. Might as well get this whole thing over with. You're not sure what you want to trade, but you think about it for a few minutes and decide you might as well switch...