Thank you!They actually aren’t. I thought so too. I think it was my priest who corrected me. The simple reason for this is that priests aren’t supposed to celebrate mass in a state of sin unless they have to for the good of the faithful. If you skim about halfway down the answer this article explains:
http://canonlawmadeeasy.com/2009/01/08/do-priests-have-to-say-mass-every-day/