Anything below 18 is too young, officer
if it's 2D then nothing is too young regardless of how repulsive it is, but my personal cutoff is anything that doesnt look at least plausibly pubescent
if it's 3D and below 18 you're criminal scum and deserve to die
Any age is fine desu
A baby that has just started teething would probably be good since they like gnawing and stuff but they can't do it to your dick with enough force, and they don't really have teeth to bite.
I don't know how sex would work, though.
2D or 3D
>if it's 3D and below 18 you're criminal scum and deserve to die
>Implying some 14-17 years old girls aren't extremely attractive
>Implying 16-21 isn't the most desirable age range
God, I hate amerifats.
When it's too old for you?
I only care about how a girl looks, age is just a number and it means nothing without context. Maturity and appearance will vary from person to person and age is far from being the only defining factor for that.
When the sperm has just penetrated the egg.