A MARSUPIAL TIGER WOODS?:   The male of this cute little Australian marsupial apparently goes on an incessant mating spree.  But it isn’t as good as it seems:

Males relentlessly bound from partner to partner, as massive hormone releases in their bodies cause their immune systems to crash and their fur to fall out. They bleed internally. Some males even go blind, yet still stumble around the leaf litter hoping for one last tryst. In a few short weeks, every single male lies dead, leaving the females to raise their offspring.

I guess there can be too much of a good thing?