A data analyst who has deliberately gained 12 stone in fat by eating 5,000 calories a day says he will not stop until he weighs a quarter of a US ton – the same as a giant grizzly bear.Far from being alone in his pursuit of morbid obesity, Spartan Pudge, 28, aka Sebastian, has 13,000 Instagram followers and is part of the increasingly popular gainer community – a sub-section of gay culture which idolises larger men and promotes body positivity.