Black Light Tattoos

In the 1960s, the black light took off in night clubs. People would paint themselves with fluorescent paints, which would become luminous under the black light. This somehow managed to carry on through to the 80s, and merged into the punk era with such things as fluorescent spikes of hair. These days it generally tends to be used for detecting counterfeit money, genuine antiques, and attracting bugs to bug zappers. It can even be used to reassure the paranoid holiday maker; A quick pass of a black light over the sheets on a hotel bed will reveal any traces of semen!