A few years ago there was an extremely broad study of all males living within a town, totalling 900 men in all. They monitored orgasm frequency over decades. As a result they were able to show that those who were below average in their orgasm frequency had a 50% higher chance of dying from any cause. That was alongside all sorts of findings about the general health dangers of abstinence. I imagine there is likely a pretty strong correlation between those who live alone and those who are starved for orgasm.