About T-Shirt Design
The joke on I Lost An Electron Are You Positive T-Shirt is easy to understand, and that is a big part of why it works. The everyday humor angle gives it a little extra personality without making the design too busy.
It makes sense for holidays or casual days, especially if the person already likes this kind of humor. It fits nicely with novelty t shirts that are meant to be fun first and serious never.
The whole point is to get a laugh, and the shirt does that without making things complicated.