Jellyfish toxin produces erections

I suppose we are all going to be barraged with spam for "Miracle irukandji" soon.

The sting from an irukandji tentacle can cause irukandji syndrome, entailing severe pain, anxiety, paralysis and a potentially fatal rise in blood pressure. Researchers have found that one rare species also causes an extra symptom of prolonged erections in male victims.

Link (Thanks, Michael Bock!)