I also once found something weird in one of my previous cars. A week after taking ownership of my Sentra, I decided to take every seat, boot mat etc out, for a nice clean.
Found a stack of Hustler magazines, lube and a "ladies tool" under the spare wheel.The car's previous owner was a young lady from Bloemfontein, who was a lawyer doing her practicals. Seems she was doing other types of practicals too.