I have a debit card connected to my PayPal account. BUT, the debit card is not connected to any other bank account that PayPal can see, and the bank has instructions NOT to automatically transfer funds into that account. I electronically transfer funds into it when I want to make a purchase, then complete the transaction using PayPal.
I'm not a fan of PayPal for a number of reasons, but still use them when it's the easiest. PayPal seller fees are 2.9% plus $0.30 per transaction, so a small transaction can get expensive percentage wise.