Fazakerley ! That said, it could have been a one-off lapse of security. No matter how cautious we "generally" are, we all let our guard down on the odd occasion. Sod's Law comes into play then of course.
One night recently, I went to bed and left the back door unlocked (true). Car keys for the grabbing, a 1950's copy of The Beano and worst of all - some crazed busty blonde could have walked into my bedroom and had her evil way with me ! One shudders (?)