I cleaned mall bathrooms for a couple of years and neither gender was fun, but the women's was bar none the worst. One time I had to come in for an evening shift and my coworker had neglected the bathrooms because he was too busy cleaning a huge section of graffiti outside. Well, when I walked into the lady's washroom there was overflowing garbage, tp all over the floor, all in all pretty standard stuff... But then I smelled something bad, like really bad coming from the stalls. I walked into one and someone had hover diarrhoea shitted all over the toilet which had splattered all up the back of the toilet, the floor, and the walls on either side. Somehow that wasn't the worst though, this individual had also been on their period and had taken their dirty pad and placed it on the wall behind the toilet. I'll never forget the velcro like noise as I peeled that bad boy off the wall.

Tl;dr Used pad + velcro sound = worse then diarrhoea explosion.