If this is fat to you, then I'm sorry but you may need to re-evaluate your standards. He's definitely not some skinny SeanCody twink, but he is most certainly not fat.
I can't picture his body at all tho and it's always confused me
Sometimes he looks kinda fat (not so much now tho) and other times he looks skinny, especially with his literal twig legs. But whatever I love him either way, he's incredibly sexy imo.
And even better with his hair cut 
yeesh.
He's definitely not some skinny SeanCody twink, but he is most certainly not fat.