Are you sure you can handle 72 virgins? I mean that's a lot of punani to take care of.
May be 4 every day. All the 72 will be used within 18 days time.

Then you need to exchange your virgins with someone else, to get fresh supplies. However, I am having certain doubts regarding this. The most important of them are:
1. Is there a supply of viagra in the heaven?
2. Are the virgins free from STDs such as syphilis and HIV?
3. Are all of them over the age of 18?