Nuns wear rings on the ring finger.
Because they are married to GOD.
This means Nun Porn should also have the NTR tag.
...
I don't know why but this makes me want to write complaint letters to porn sites about improper tags, just because it is the sort of insane thing to bitch about customer service would have to take seriously. You just KNOW CustServ would read the email and slowly shake their heads, wishing they had made different choices in their lives and wondering how the hell they wound up here.