>>82560859 (OP)
Pedophilia strictly speaking refers to attraction to sexually immature children, under the age of 12. Attraction to anyone 12-16 is sketchy for sure because kids this age are so emotionally vulnerable and incapable of thinking rationally. They're extremely vulnerable to manipulation. Whereas teens 16 - 20 are less vulnerable to those sorts of manipulation, they're vulnerable in a different way as they experience sexual and romantic motivation to expose themselves to others and be judged. They crave to express their feelings, receive feedback and expressions of feelings from others and to be accepted both by themselves and by others.
Kids in the 20s are still immature overall and don't really reach full mental capabilities until around the age of 27 - 28. Based upon what we know so far, brain development has mostly settled into a stable state at these ages. By the mid 30s most people have been able to reflect upon themselves and their emotions while coming to terms with their life experiences. This is a crucial developmental process. As you enter into your 40s the odds of a so-called "mid-life crisis" increase where you question your prior motivations and especially must face up to and deal with the actual state of your life versus where you thought or wished you could end up.
I'll comment on 50s and 60s when I get there, but as far as I can tell I'm a 40-year old child. I might be a bit more mature at 80, or 500 or something.