I lack carnal knowledge on the subject but having ridden with lots of men over the years, the most I hear about is how much better their sex lives are because they are healthy and in shape.

Of course, I hear lots of dissatisfaction from men whose wives are less than understanding about cycling/exercise desires/needs and view sex as their duty or obligation. It never ceases to amaze me how many men get sex very seldom from their wives. Isn't sex an expression of love for your mate? And isn't an interest in your mate's activities and what makes them happy an expression of love for your mate? Of course, I know some men who believe life is all about them, too. Human nature is an interesting study.