Dr. Edward Peters has written some good stuff on this issue. Easy to Bing (which I prefer) or Google.
Fundamentally, clerical CONTINENCE is directly linked to Eucharistic Realism.
ALL clerics (deacons, priests, bishops) in the Roman Rite are bound by canon law to the obligation of perpetual, perfect continence.
Yes, you once provided me with a link. I should go look at my older posts. Sorry, I’m being lazy.