For most politicians their private lives are private and should stay that way, but now and again, you get politicians where there private lives are so messy and/or public that, one cannot but ask as to what that tells you about the general way they conduct their life in private or public.
Cecil Parkinson's behaviour after he was caught out with a pregnant mistress, said a lot about him, none of it to his credit, he paid her off (he could afford to) and had absolutely nothing to do with his daughter after she was born, even when she was diagnosed with disabilities. Never saw her, or expressed anything but cold indifference.
Boris is much the same, two marriages down and a third in the offing, constant infidelities, one acknowledged love-child and much talk of at least one more. This fits with innumerable stories of his capacitiy as a liar on matters large and small. His close friendship with Darius Guppy, a convicted fraudster, who asked him to get a journalist's address because he wanted them to have something nasty happen to them. Boris didn't do it but, he evaded giving him a direct refusal.
As Max Hastings has said examples of two enduring facets of his character: first, he will say absolutely anything to man, woman or child that will give them pleasure at that moment, heedless of whether he may be obliged to contradict it ten minutes later. Second, having registered his wild-card status as a brand, he exploits it to secure absolution for a procession of follies, gaffes, idiocies and scoundrelisms, such as would destroy the career of any other man or woman in journalism, never mind government.
In fact Max Hasting's whole article is worth reading.
www.maxhastings.com/2018/the-english-love-a-buffoon-but-the-boris-johnson-joke-went-tragically-wrong/
Could anyone vote for this man to be Prime Minster?