Although I am not super endowed, my measurements are reflected below, I can certainly testify that the doggy style for penetration is the most rewarding for me and also my spouse. She can reach back and fondle my scrotum and I can gently fondle her breast or even the exterior of the anal orifice. All of this is fun and can make one trigger happy, but I have found that nice and easy with a lube can keep things under control. During my recent activity in the Indiana University - Fit and Feel Condom Study I usually was able to conduct and conclude sexual activity with a worthwhile orgasm at the five to seven minute mark. Admittedly I am a more mature LPSG Member than a vast number of members here, but sometimes age can be a wonderful thing.