It doesn't make that much non-sense even if you haven't used it. About the only thing you need to explain to people is that unless you use different addresses, people can see all the transactions you make. Other than that it is "here is a piece of software. It can send bitcoins for a transaction fee of 0.0005 btc, and can receive them. Transactions take time. Here (mtgox) is what 1 BTC is worth. Have fun." Aside from maybe explaining how mining works (most new users don't even care) all the rest just says "it works exactly how you'd expect it to work; here's why."