When I was in my early 30s my cock was about 7-3/4 X 6 inches. I was in Asia and almost every gal I was with had orgasms when I put my cock all the way in, past their cervix, and into the top end of their vagina called the fornix. If I would gently thrust my cocked in that area, most of the time they would climax. Early on one of the gals had taught me about that. Later I understood that it is sometimes called the upper G-spot.
Fast forward to when I was 65 and my cock had become smaller, about 5-1/2 by 5 inches. An Asian gal about 35 and I hit it off, and after several months we started swinging with other couples and single guys. I could never make her cum with my cock, only by oral stimulation of her clit. The first three years, the largest guy we had join us was about 7-1/2 X 5-1/2 inches. She felt that was her limit for size and anything larger caused her pain. Also, she never came during penetration by either of us.
Then I learned that if she had a good climax, the muscles around her vagina became looser, and she could take larger cocks without pain. After a while, she began taking, and enjoying, larger and larger cocks. As we were having dinner with a guy, we started discussing climaxes from penetration. I told him about my experiences when I was 30. He agreed to try it. It worked, and she had a great climax from him gently thrusting his cock head into the area post her cervix. Since then, most of the guys we have been with have been able to give her a second climax that way. Her first climax of every session is from foreplay and oral to get her ready for a large cock and in general, really hot for the sex.
