Obviously the direct approach isn't working. Time to switch up tactics and try a new manuver.

First: its not cool that he teases you about your weight. These microaggressions can build up over time. It would be no better if you joked about his "dadbod" or teeny peenie. So you'll have to ask him to stop.

Second: don't confront him directly. Next time you come across a pucture of someone lime Ashley Graham mention how pretty she is and gague his reaction.

Last point: The eating kink is weird, but everybody has theirs. Mine varies but its never anything about my wife; pure escapism and fantasy. His seems to be rooted in something subconcious.

Next time you're out at a restaurant or on a walk-about, smoothly work it into a conversation. Ask him but let him know no judgement will occur. You can even lead with a kink of your own (real or made up).