Two nights back, an ex-girlfriend from college came down from Connecticut where she’s now teaching high school French, to join me in taking advantage of Restaurant Week at nearby Vice Versa. And over altogether too much excellent food and wine, after catching up on life and talking through our various angsts and excitements, she somehow roped me into helping her revamp her marathon training plans.

Somewhere between when we dated and now, it seems, she discovered that if she starts running, she can pretty much just keep going. And, as a result, she’s not only completed a number of marathons, but even placed in the top five runners for her age group in a handful of them. With another coming up in April, she was looking to speed up her mile split times, to do something in preparation other than just run as far as she could each day. By the end of dinner, I had somehow agreed to help coach her to that end.

On the one hand, as someone with a long-standing interest in sports medicine and fitness research, I might seem like a good choice. But, on the other, as someone who, after hitting about the one mile mark thinks “well, that’s enough running for this month”, I’m probably not such a good coaching choice after all.

I thought of the same thing last night, when another close friend came to my apartment to, over another bottle of wine, trade gossip and dissect her current dating conundrum. After hearing her full retelling of the sordid tale, I tossed in my guy-perspective analysis, which, it seems, my friend found dead on, and was apparently exceedingly grateful for.

But, here too, I felt a bit suspect in terms of qualifications. Certainly, as Edison once pointed out, the first thousand failed light-bulb prototypes weren’t really failures at all, but discoveries of a thousand ways not to make a light-bulb. And, from that perspective, I’m undoubtedly a relationship pro, having discovered about an equal number of ways not to have a relationship.

But, really, if you’re trying to run a faster marathon, shouldn’t you seek advice from someone who’s actually a marathon runner? And, if you’re trying to figure out if your ongoing relationship has any long-term hope, shouldn’t you talk to someone who’s navigated the pitfalls of New York dating into a long a happy marriage?

Well, yes, you probably should. But, apparently it’s easier and far more entertaining to talk to a smarmy generalist willing to pull elaborate theories about love and life and running long distances out of his ass instead. Which, come to think of it, is probably a pretty good explanation of how my life works as a whole.