Exactly. Fill 'er up, boys!!!!
Through the teeth, over the gums; look out, stomach - here it comes!
Perhaps because those things have little nutrative value, we feel we need to eat more until we can obtain the needed nutrients (which might never happen).
Of course, it is HARD to "gulp" things like salad. Needs a lot of chewing. I can sure gulp fruit, though. Fresh ripe summer peaches or nectarines? Hand them over, NOW!!!! ha ha!