also known as steamybutt or "athlete's foot of the rectum"
testimonial of one sufferer:
I do live in a country with a semi-tropical summer and a warm rainy season. This has meant that on many days my bicycle saddle (sadly not motorbike, only a weedy pedal bike), like I said, my bicycle saddle is often very damp or even drenched with tropical moisture in the morning. This means a whole tropical summer day with a damp behind - steamybutt. And this in turn leads to an embarassing medical condition that you may not have experienced which can only be described as ... and this is quite embarrassing .... ATHLETE'S FOOT OF THE BUTT !