Why did JJ Thomson named his first atomic model as plum pudding model?

According to JJ Thomson's model, an atom is a spherical positively charged species in which the negatively charged electrons are randomly placed over the entire sphere just like the dry fruits in a Christmas pudding. That is why he named his model as plum pudding model.

JJ Thomson concluded from his model that:

• An atom is a positive sphere in which electrons are embedded.
• An atom as a whole is electrically neutral because the magnitude of positive and negative charges are equal.