During this time of year, the toads' forearms also enlarge to Popeye-esque proportions to better prepare them for the hostilities to come. Or perhaps just because they're compensating for something ...
Unlike humans, where strong forearms prepare you for the non-mating to come.
The toads are unusually violent toward one another, and their lip-spikes are "as sharp as pencil lead." So a whopping 90 percent of all combatants incur injuries during the course of the duels. But when mating season is over, the toads lose their 'Stache of Fury and stay behind to care for the unborn kids (possibly even if the eggs are not their own), while the females leave the breeding grounds. We take it all back: A mustache-fighting toad secure enough in its own manliness to be a stay-at-home dad is the kind of male role model we should all be lucky enough to find.