People love watching The Simpsons simply because it's funny. It's been around for such a long time now that it's become a sort of classic. People have tatoos of the characters because they like them and because The Simpsons is so well known it becomes a sort of trend to have them.
It's also obviously still popular with young children, even though it was around way before they were born. Many children can relate to Bart, which is why they become so attached to the character. I wouldn't advise any children to get tatoos of him though - there was one little boy who recently got a henna tatoo of Bart and it ended up scarring him for life and he's now left with the imprint of Bart with his trousers down on his arm! It's not a good idea for children to have them!
It's also obviously still popular with young children, even though it was around way before they were born. Many children can relate to Bart, which is why they become so attached to the character. I wouldn't advise any children to get tatoos of him though - there was one little boy who recently got a henna tatoo of Bart and it ended up scarring him for life and he's now left with the imprint of Bart with his trousers down on his arm! It's not a good idea for children to have them!