INTRODUCTION
Drugs such as nitrites, methamphetamine, phosphodiesterase type 5 (PDE-5) inhibitors, ketamine, gamma hydroxybutyrate (GHB) and others have long been used as precursors to sex or during sex by some individuals. Nitrites in the form of amyl nitrite have also a long history of use in the treatment of angina pectoris and as antidotes in cyanide poisoning (1, 2).