You haven't proven you're making any sense, either.
The only point that matters is: my phone should not do that when I touch it with a fingertip. No other cell phone on the market today does it except the iPhone 4 so...
That's the point. If you're the one trying to troubleshoot the issue and trying to fix the problem that isn't the only thing that matters.
As I haven't tested all cell phones on the Market (neither have you) that statement is dis-information.