About T-Shirt Design
The joke on Dogs Love Me T-Shirt is easy to understand, and that is a big part of why it works. The dog lovers angle gives it a little extra personality without making the design too busy.
It makes sense for birthdays 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.