Nobody KNOWS why we do this thing we do and to what extent we do/are we trying to pass or not. That is a common element here.
It's (CDing) like most things. Basic math. Do enough research with an open mind in the right places.. My guess is that most here (with an OPEN MIND) willing to spend at least an hour or 3 WATCHING at least one documentary on the miracle of our UNCONSCIOUS brain, and how IT is in control of so much of what we do and not our conscious mind...would stop fretting and fussing and fuming about the WHY. It's likely some combination of multiple factors. Which is not to say that it could be as simple as just being born in the wrong body for some.
Science has shown beyond any question, our UNconscious is easily able to multitask. Our conscious mind is very poor at it. We are NOT in control of "a lot of stuff" we do. Picking a mate is just one prime example. Many very bright people make bad/wrong choices in mates because we are not in full control of that process. Anyone claiming different is not living in the RW.
Amazon prime has at least a couple of good documentaries on this right now or did a few weeks ago.
No documentary is likely to provide THE answer for anyone but it will illustrate how we MIGHT be powerless to "control" this CDing thing.
Because of the sexual component so common to the vast majority, it does become an ADDICTION for many. One quick look at the views and responses to such threads confirms this. It's easy to notice that for most of the folks, that the sexual component is long gone, are over 50ish. Maybe way over.