I've only started noticing it recently. But whenever I get hard, my toes and fingertips start to go numb. If I start getting ridiculously turned on my breathing increases and the numbness spreads, I start to feel lightheaded too. I'm only eight and a half inches in length, but nearly 8 inches around. Is it normal for someone of my size to get this, or should I be worried? I'm shit terrified I'm gonna pass out during intercourse or something.