It depends who you ask my reasons not to date:

• I would tell you it’s because my spouse and I have been together for almost 30 years and, well, I have yet to find someone else able to make we want to engage in anything potentially meaningful.
• I imagine some people would say it’s because I’m getting too old (and bald, and too grumpy) to be allowed to have fun, or just that I’m too ugly.
• Finally, some extremely fascinating persons, may tell you I don’t date because I’m a giant lizard wearing a human costume that is afraid my true nature would be revealed if I ever were to become intimate with another human being. Obviously, if it was still among us, my pet hamster would tell you that’s non-sense :p