I get the Weirdest Sensations
When I'm getting intimate with my girlfriend, I'm completely comfortable pleasing her with my hands and mouth. But when she goes down me I start to shiver uncontrollably. My knee has almost jerked into her head more than once. I don't think it's a cold shiver, or a tired shiver, just a ridiculous nervous reaction. After a short while of this, my cheeks, the ones on my face, go numb like the way a foot falls asleep. I can last pretty much indefinitely, getting head, but as soon as I'm inside her I'm done for. I'm a good looking guy in my early twenties and have a decent track record with women, but I feel like I have some serious underlying nervous issues. Help?