I had 2 clients insists on taking the used condom home with them 1 even had a special little plastic bag for it this was a long time back and not had it since 1 said he was paranoid if there was a police raid and they had his sperm as evidence he had visited!!! Another said he had always done this as a precaution incase something bad happened to the working girl he was visiting like she got murdered by a client after him and his sperm was left behind in a bin and he would become a suspect..crazy but some are very paranoid.