Hookers are tangible services (you don't get to keep them).
skadoosh00 I would think the showing off would be worth 5 minutes.
If infrastructure were in place such that bitcoins could be exchanged similar to a credit card transaction, or payable by phone, how long does it take for an exchange of BTC to clear?
The new Android client (and possibly others) allow for NFC style payments, so it may be close enough. The transaction will appear as soon as the next block or two are found, but may not be confirmed for many hours. A day is a safe bet, depending upon your appetite for risk.