I am 78 and have no partner, my wife died 5 years ago. But I still have good erection when watching XXX movies, preferably the so called ‘girl/girl’ movies which some times prompt me to masturbate and I get satisfactory, if not strong, orgasms. What, if any, health inconveniences can solo sex bring at my age? Despite my age I consider myself to be in good health, without any history of heart disease, diabetes, prostate disorders, digestion problems, or obesity. Thank you.