I'm hi. I'm zach 13 years old 5 8" tall. I'm far into puberty and am on my groth spurt. I've been growing a ton (an inch in like 2 months) and well I think my penis is kind of small. It's about 3 1/2 inch hard.... Should I be worried? My voice almost never cracks only like once every couple days when I'm yelling or laughing. Can someone tell me the average size? :S
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