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It's partly because I'm just not devious or cunning enough to keep an affair secret. It's partly because I never had the energy to keep two women on the go at once. And it's partly because I've never been besotted enough with another woman to want a serious fling. I'm obviously an engrained monogamist.
Well, it's difficult enough keeping one relationship going, if you're serious about making it work and giving the other person the tender loving care they expect.
How people manage to do that twice over I don't know. I suspect they don't, that one or the other partner always gets short shrift, marginalised and neglected and frustrated.
But I'm amazed how affairs can be kept secret for so long. You hear of affairs that lasted five or ten years without the husband or wife ever knowing. How can anyone really close to their partner not pick up on suspicious behaviour pretty early on?
I'm sure I couldn't have had an affair for more than a week without leaving Jenny some fatal clue - a mysterious phone message or an unfamiliar fragrance or a dubious-sounding 'engagement'. I expect my face alone would give me away, as I'm not good at hiding my emotions.
Some people actually relish the danger, the frisson of a clandestine mate their regular squeeze is unaware of. But I couldn't stand the stress and strain myself, it would destroy all the pleasure.
No, I'm as clean as a whistle in that respect. Boringly loyal and devoted and dependable. Even though I'm a hopeless rebel in so many other ways.