So then. I believe it's high time that TMK dealt with one of the Mario series' most enduring questions:
Is Toad's mushroom-cap some sort of headgear, his hair, or or simply his upper cranial cavity?Of course, whatever is the case, it applies for all Mushroom People/Toads. The first reference to the matter comes about with Toad removing his cap in the
Super Mario Brothers Super Show(!) to use the thing as a parachute, briefly revealing his folically-challenged scalp underneath. The concept of Mushroom People concealing their actual hair beneath a hat is further supported by PM:TTYD's Zip Toad, shown below:

...Not to mention Mojo Nixon's precedent-setting depiction of the guy in
Super Mario Bros.: The Movie:

Conversely, Toad's female counterpart, Toadette, is shown with pigtail-like mushroom bits protruding from the main section. Of course, it could be argued that she simply wears a feminine variety of the usual 'shroom hat, although it's doubtable. One must also consider that if such is the case, Toad has an afro and therefore is black. Yeah. To illustrate the "hair" theory...

Lastly, the spotted mass could simply be a vital article of a Mushroom Person's biological composure. I couldn't find any canonical basis for the idea, but just thought I'd throw it out there.