Once lived in a flat where the toilet was downstairs. I got a gastric flu bug & was caught short in the middle of the night. Rushed downstairs...slipped on the third step from the bottom...went ar$e over tIt...I've cr@pped on my own stair steps:-(
carrust is quite correct, it is not uncommon for a woman to defaecate in the excitement of orgasm.
I first came across this when I was working in Brighton and was the talk of the junior doctors mess (sorry), a mate recounted how this nurse straddled him and when she moved aside, left a faecal mass on his stomach.