As for the curve, you didn't mention if you are circumcised.
Circumcision can distort the erection, as almost always the skin is too tight, and circumcision always reduce sensitivity from 50% to almost completely insensitive.
There are no benefits to male genital mutilation. There are many complications which are suppressed, as noone would practice this if the truth be widely known.
My young friend, if your penis is truly seven inches when erect at the age of 14 afterwards you are certainly above average, and at your age it is likely that it will grasp even longer as you get older. as for the curve plentiful men have slight curves in their penis from the right to the vanished and up and down, its nothing to worry around.
Perfectly normal. The average for a grown man is 5-6 inches.. so your actually above average, even if you own stopped growing.
:) well done