Totally agree get the girlfriend in doggy postion and i hate to say it I'm done like in 3 minutes.....her twat is like a vice...after about 6 - 8 thrusts her twat holds the position....
You don’t necessarily need a big cock for this to happen. I am average and my wife’s pussy is a gripper. I love watching it in doggy position which also gives me a great view of her naturally hairless ass hole winking at me. My first girlfriend did not have a gripper, in fact I was amazed the first time we did the deed how easily my cock slipped in. Maybe she was super lubricated because she was so horny, but it was like this every time. My wife needs a good few thrusts before she opens up.