Which Pope Leo? When most people say Pope Leo they mean Leo the Great, Leo I. He was rather saintly. Which Leo do you mean?
I would go with the homosexual Leo X.
The otherfun pope was Pope Benedict IX (1032–1044, again in 1045 and finally 1047–1048) was said to have conducted a very dissolute life during his papacy.[34] Accused by Bishop Benno of Placenta of “many vile adulteries and murders.”[35][36] Pope Victor III referred in his third book of Dialogues to “his rapes, murders and other unspeakable acts. His life as a Pope so vile, so foul, so execrable, that I shudder to think of it.”[37] It prompted St. Peter Damian to write an extended treatise against sex in general, and homosexuality in particular. In his Liber Gomorrhianus, St. Peter Damian recorded that Benedict “feasted on immorality” and that he was “a demon from hell in the disguise of a priest”, accusing Benedict IX of routine sodomy and bestiality and was said to have sponsored orgies.[38] In May 1045, Benedict IX resigned his office to pursue marriage, selling his office for 1,500 pounds of gold.
Thanks Wikipedia!