The idea that priests who have sexually abused boys must have done so because they are homosexual is ridiculous. Most of adults, regardless of our sexual orientation, are hard wired to be attracted to adults. Homosexual men are just the same.
I have known a number of priest in my area who were accused of having sexual relations with teenage boys. Can I prove they were homosexual? I never asked them; but I have observed males and femals since childhood, and I am well aware of characteristics of sme males which could be idnentified as “feminine”. This is going to get us all into stray territory; (can’t find the popcorn emoji) and I have no interest in dbating mannerims.
However, the Man/boy relationship is well established clear back to ancient Greece and is not some sort of historical anomaly. SExual impulse (and I would say, not natural) does attrract a small subset of adults with teenage children;; cross sexual is what we hear most of (e.g. women teachers and teenage boys; men teachers and teenage girls) and I have yet to hear of issues of female women and teenage girls - but I certainly have heard of homosexual men and teenage boys.
Abuse is an interesting word. Abuse can be due to coercion; but to presume that all sexual contact between a man and a teenage boy is coercive ignores the fact that we are seeing and hearing of teenagers self identifying as having SSA; and if a male teenager who self identifies as having SSA engages in sexual activity with a male adult homosexual that is considered by law to be abusive, but not of necessity coercive.
A man could be sharing a marital bed with his wife every night but be abusing little cub scouts every chance he gets.
Or teenage boy scouts; the slang term is he is AC/DC; or more properly, bi-sexual. I don’t know statistics, and I have not gone through the list of abusing priests who abused teenage boys (the great majority) to see if any of them abused girls also - that would take far more research and be far more difficult to determine than I have any interest in doing. But the evidence from the John Jay report appears to support that male priests ab;used male boys.
Pedophilia does tend to be non-discriminating in large part as to whether the child abused is same sex or opposite sex, and it most certainly is not unknown in families for children of both sexes to be abused by the father (I have handled one such case); but those are cases of pre-pubescent abuse. The great majority of the abusive priests were against teenagers.