no youre a freak
That is perfectly fine.
I'm 15 and i have a 8 and 1/2 inch penis and the average penis for a 15 year old boy is 6.2 inches when erect and 4.1 inches around
We don't know. Some men have an 8, 9, 10 inch penis. Very seldom bigger. We can't say how big your's will be.
I don't think so.
It's very good. Very good indeed.
Depends on whether your penis is erect or flacid. Also, if you are Chinese I wouldn't worry - you're ahead of them in terms of penis size.
If you're talking about penis size then, yes! That's not huge but it is bigger than average. Congrats to you! It may even get bigger as you get older.
15 year olds shouldn't be having sex.
This all depends on how far into puberty they are. It could be 1.5 inch if puberty not started.
12 Inches.
it really depends on when you atrted puberty. if it started around 11 or 12 its not getting much bigger but if you started later it might grow another 1/2 inch to an inch.
Not to sound rude but i highly doubt that u have an 18" penis