What is the early history of pedophiles and homosexuals priests in the catholic church and when did this first become a problem?

Answer 1

There have always been pedophiles and homosexuals, priests or otherwise. The Catholic priesthood doesn't have any higher occurrence of these than the general population, and actually by most counts the occurrence is much lower. People will sin, regardless of their position in life. There are pedophiles and homosexuals in every religion, race, etc. Furthermore, the Catholic Church doesn't consider homosexuality in and of itself to be a sin. Only homosexual acts are sinful, just as are contracepted sex, premarital or extramarital sex, and sexual relations of a priest.