John Prescott, infidelity and honesty

It is a relief to me that political parties seem now to be treating marital infidelity as 'a personal matter'. This is not to ignore the pain or to make any moral judgement but accepts that 'having an affair' is in fact not an aberration, against the natural order of things or profoundly immoral. It accepts that neither does it in its self provide any meaningful basis to doubt other parts of the key player's character, as the press like gamely to imply, such as his or her ability to hold office, or any other variations on general honesty etc. So farewell I hope to the 'if he lies about this how can we trust him on anything' camp. Where did this rubbish moralising come from in the first place? I think it might be rooted in court room drama and lawyer speak where a witness is destroyed by proving that they have 'lied before so is lying now'. How we still tolerate that bullshit is another question.