Hi Dr. Doe, I've been following your you tube channel for awhile now. I love your videos. I find them to be entertaining, funny, and educational. I don't know if you've ever touched on this topic but, as a make on his 40's, I'd really like your input on erectile dysfunction. I have been struggling with this more and more over the past year or so and, although, I know it's a part of getting older, I'd really love your input on this matter. Please, help.