“The discerning observer may infer women’s experience of vaginal orgasm from a gait that comprises fluidity, energy, sensuality, freedom, and absence of both flaccid and locked muscles.”
http://www.ncbirofl.com/2009/09/womans-history-of-vaginal-orgasm-is.html

“This case study relates to a suspect accused of shop-lifting a pair of underwear briefs from a department store. The report presents a method that was used to distinguish between new and used underwear employing both laser examination for biological staining and microscopical examination for thread wear.”
http://www.ncbirofl.com/2009/09/distinguishing-between-new-and-slightly.html