Ok, I'm a liiiiiittle under 4 inches non hard. And I'm a liiiiiiittle under 6 inches when I'm hard. And for the past month. I've been getting this very strange rumbly feeling on my chode. And so I'm wondering...Is that like a sign that the next thing that will happen too me is my penis growing? I mean, I've got pubes, arm pit hair, went through a rapid growth spurt and everything..I've got some facial hair. It's bound to happen, I'm just wondering is that a sign that my penis will grow soon or?..Please help!, It'll be much appreciated.