Given that gastic stapling/restrictive surgeries exist, perhaps this is related? I have a severely obese friend who got such a surgery. He is substantially hea

Given that gastic stapling/restrictive surgeries exist, perhaps this is related? I have a severely obese friend who got such a surgery. He is substantially healthier now, shedding over half his original body weight. EDIT: But see other replies on satiation vs fullness.