These teens & adults probably think you are too old to watch these or they think that those shows are stupid. Or possibly they are just being immature.
some people think it's childish
Possibly, it is just because she is not a "cartoon person". Many people simply aren't. My wife has a fantastic sense of humor, but she is not a "cartoon person" - print or animated. I wouldn't put too much weight on the fact that your girlfriend is critical of it.
It doesn't, what makes you childish is your behavior
maybe
Why wouldn't they be? There is nothing wrong with watching cartoons as an adult
I think anyone can watch cartoons no matter how old they are.
Its personal preference. No one is too old for anything, so if you enjoy watching kids cartoons, go right ahead.
Johnny Atomic goes by Johnny Atomic.
Most people tend to stop watching cartoons past the age of 18
Yes you can be to old to watch some of them
Atomic Betty was a 12 year old Canadian cartoon girl from Moosejaw Heights that fought as a Galactic Guardian. Johnny Test was an 11 year old cartoon boy with two genius sisters. Both cartoons were made by Warner Brothers.
Not at all. Part of us always remains a child. I asked my parents if adults watch cartoons, and they told me it depends what they like.