This was not a sex scandal. Jamie Briggs resigned over an abuse of power. To define his predatory behaviour as any other than that implies an element of consent, which was clearly absent from his harassment of a young diplomat in a Hong Kong bar; a bar which was, as it transpired, very crowded.
The former minster would like you to know that.
It's most important you understand that the bar was very popular and "as it transpired, very crowded". Why, so crowded and so popular that almost anything could happen. A fellow's elbows might be jogged. He could accidentally stumble into someone. Why, even with the best of intentions and most honourable and innocent of designs it is a passing possibility that in such a crowded and popular venue there could be initiated the sort of glancing contact that some might misinterpret as less than 100 per cent appropriate.
But really, in such a popular and, as it transpired, crowded bar, who is to stay what actually happened? To quote The Simpsons' long-serving mayor of Springfield, Diamond Joe Quimby, "That could be anyone's ass!"