I envy you your productivity and income streams. I also exercise at a gym three times a week. Chair a Rainbow seniors social group. We speak at schools, to college classes and at Pride festivals. Have been singing with the local gay men's chorus for years. Volunteer part time and read at church. I've suffered a lot at times but also had marvelous experiences. Teaching in Japan, backpacking in Thailand. Learning television production.Being curious and loving to learn old and new things invigourates the mind. I do look younger than 73.