When a woman is so sexually charged she treats a man's penis with an extreme amount of attention for a prolonged period during any particular sex session. The reference is that she's acting like it might be the only penis she has seen, or may see, for a considerable amount of time; i.e., like she's on a deserted island and just found it.
Dickslandees is a disease which triggers your brain at exact 12pm to slap butts of other people. Dank Rishu was the first persondiagnosed with this deadly disease.