You're 42 years old. Grow up.
A 16 year old boy dreaming of a 16 year old girl is natural.
A 40-50 year old doing the same is just plain sick.
1) I'm 45.
2) Then all of the male population is "sick".
3) As for growing up, I'd say that you need to become a bit less naive about the male creature. It will make life easier for you and the males you run into.
4) And WTF does age have to do with physical attraction when the female of 16 meets the same criteria as the female of 23 ro 33? (of course the 16 year old is more likely to have better boobs and skin tone).
Who ever told you that older men fantasizing about younger women was "sick". That's pretty sick.