The truth is that being horny is like being on drugs: it lowers your inhibitions, which are actually an inherent part of you, so what you fap to doesn't necessarily mean it's what you like or who you are, you just hopped up on that rush so most will do. That's how my dad put it anyway during the "talk", what you get excited about doesn't always have to be a big deal about who you are, but continually subjecting yourself to this "drug" will only make you more likely to try other forms. So yes, there is a reason why people develop more fetishes the more degen they are, it's not 100% of who they were, most of the time it's just you seeking a new high. Regardless, I was taught no matter what that you are responsible for whatever you do in that high and you should always be frank and honest with yourself if you've gone too far.