Even IF we accept your premise that they are teenager's. Scientifically and biologically it is considered completely natural and normal to be physically attracted to the opposite gender once they start developing sexually.But Talim and Amy don't look like 20 year olds, and they don't have adult physiques, especially when compared to the females in the game that are considered adults.
Honestly, look at Tira. If Tira is supposed to be around 17-20 years old, then Talim and Amy clearly look like young teenagers.
This attraction is not, and I repeat is NOT pedophilia.
Now this being said. Being attracted to people who've started demonstrating sexually appealing features and acting on them are two different things.
A person can both recognize the maturing sexual appeal of a young lady AND recognize that they are underage and off limits due to still needing time to mature and acquire the experience to fully understand consiquences and be on an even playing field.
Now there are some who are attracted to and desire to prey upon that naive vulnerability and that is wrong. You will get no argument from me there. But someone simply being attracted to a females that demonstrate child bearing ready traits is normal and natural even if in the earier stages of such.
We are not discussing prepubescent children here.
Is the obsessive attraction some have kind of creepy? Yes due to the predatory aspect I mentioned. Is just the attraction itself, however? No it is not.