We are in our 80s. For the past year, we’ve met several times a month for companionship and sex. It has been wonderful and we have been learning so much about sex. She had children with no problem and never had any problems at the gynecologist. If we start a sex session without much foreplay because we are both excited, she feels a tenderness for a short time but seems not bothered by it. I notice that initial penetration can be difficult. With my fingers, I was surprised to feel like 2 vertical bands when she is lying on her back. These bands mildly resist one finger and prevent 2 fingers. Later with more arousal and natural lube I can insert 2 fingers. When she is aroused, my penis is hardly aware of the vaginal entrance. I am guessing she may have a partial hymen, but wouldn’t that have been opened during her vaginal childbirths? These bands feel like part of the vaginal entrance, inside just a bit. Otherwise, she is in very good health. In addition, at full penetration, the tip of my penis seems to enter a stiff cup at the end of her vagina.. Over the year of our activity, this tissue has become more pliable. By studying anatomy diagrams, I am guessing that this is the anterior fornex which had not been flexed until now. She gets great pleasure from this area and so do I. Thanks for any insights.