My fiance rubbed some vapo rub on my scrotum. she thought it would be funny. At first it began to tingle then it began burning. Next there was a very strange sensation of burning and being cold at the same time. I then rubbed some in her ass crack. She reported the exact same symptoms but claimed they were more severe. She tried to relieve the effects by lying on her back with her legs in the air, parting her buttocks to increase the airflow around the now painful anus area. In the final analysis we suffered for 5 - 6 mins but it soon subsided. We have repeated this experiment over 3 times and the finings are consistent.