Board Thread:General Discussion/@comment-27033632-20150930231034/@comment-5903643-20151021024158

Cindy 77 wrote: I'm just going to point out that they put clothing on Crash Bandicoot, Mario, Mickey Mouse and Spongebob Squarepants, although Sonic far from being the only one who doesn't wear pants. They didn't put pants on Garfield, Felix the cat, Bugs Bunny and most Looney Tunes characters,  Scooby-Doo,  Tom and Jerry, Elmo, Cookie Monster, plus heaps more.

In the world of cartoon, it is completely normal that Sonic doesn't wear pants or have private parts.

You just hit the nail on the head.