What Reasons are there to have a debit card linked to you PayPal Account?

What Reasons are there to have a debit card linked to you PayPal Account? just wondering since theres an option to add a debit card i was just wondering why someone would.|||I have a PayPal account linked to a debit card. I refuse to use credit cards (haven't had one in over 10 years), so PayPal simply takes the costs of my purchases out of my checking account via the debit card. This means that I don't have to give my bank account/debit card information to on-line sites -- stops potential identity theft problems.