Yeah, to me it's a weird way to encourage more gaining. Like everyone truly fat weighs over 600.

I guess there is an element of guilt to the whole experience, if you allow yourself to feel it. Guilt for greedy eating, taking up more space and resources, and guilt for breaking things with newfound weight especially, seats cracking and beds bending.
Your enjoyment of eating and/or being fatter just needs to outweigh (heh) your reservations.

Maybe start up your appetite with a bit of (very) light exercise? Then overeat, and sleep. Soon your appetite will grow enough you can skip the exercise, and really put on some pounds.

For me, it depends. If I knew I wouldn't see anybody I know and would have to see again, I'd wear tiny clothes and burst out of them in public. Buttons popping and seams ripping as pounds of fat force their way through.

If you could just gain 20 lbs in a minute, would you? No eating required, just instant extra fat.

My goal is just to keep growing. I can definitely get over 450 (if I haven't already), and I'm going to enjoy myself with all the extra eating for sure.

Before your belly covers the sight of your dick, it forces your fupa downwards. That's what makes your dick disappear. It becomes swaddled in pubic fat, then that grows, covering more and more until the head barely sticks out. Then even that is swallowed.

I'm always outgrowing something or other. Shirts stop meeting waistbands, and waistband get rolled over and forced down. I'm up to 5XL tees and 56 inch jeans, depending on brand.

I think I just need to give in and buy a heavy duty scale. At least 500 pounds.

Yep. I roll my gut over my belt, undo some shirt buttons to let my stomach bloat as I fill it with drive thru food.