Dear How to Do It, I just got to have a sexual experience with a guy I’ve been desiring for a long time, and it was such a disappointment. He could not penetrate me. We tried all kinds of positions. We are both big but not obese, and he has a big “beer” belly. He kept telling me to relax, but I was relaxed. I wanted him. I was well-lubricated—my panties were soaked. I am in my early 50s and never had children. The few sexual partners I have had never had a problem like this. I have used dildos without problems. My overall impression was that he was “short,” but he left me feeling ...