It is o.k. to like clean entertainment at any age, don't worry what people say.
Because that's likely their form of entertainment
they are too old and watch ADULT shows.
I am not sure that they do. I am an adult, and I have never seen a show that told me that it was bad to watch cartoons. I still watch them sometimes, even though adults are a lot busier than kids usually, and we have less time to watch. But cartoons are still fun, and many adults still watch them. In fact, some cartoon shows are made for adults.
because adults are older now they might still watch cartoons from time to time
They expect the teenagers to be more mature now, and the teens sometimes feel that they have outgrown cartoons.
Some adults find normal tv shows boring and perhaps depressing (news etc.) They are trying to find a new source of entertainment and watch cartoons because they usually consist only happy and joy full things. In the other hand sometimes adults watch anime, which has shows that are meant to be watched by adults, so its normal.
because their expectations are too high to have the perfect child
because they want to pretend thet they actually want to be adults
because they are grown up :) its like how little kids watch kids shows, and teens & adults watch grown up shows. its normal..?
Cartoons and children shows are a lot easier to understand they require less thought to understand them. Many adults look for something a bit more mentally or psychologically challenging. Add to that that there are some things that adults don't want children to see.
The difference is the maturity and experience that an adult has. Watching only cartoons as an adult can result in a lack of maturity and experience whereas an adult watching cartoons as part of his or her entertainment shows responsibility and more maturity
Yes, when an adult you can decide yourself what to watch.