i used to have a BMI of 31+. Some years later my BMI is 20.
With less fat on my butt sitting down is more uncomfortable in general-- even in a cumfy armchair it gets uncomfortable much more quickly than when I was bigger. Sitting on ANYTHING is much more uncomfortable when you have lost weight IMHO-- not sure there is any solution to this-- unless I put weight on again-- think I will live with the slight discomfort though!!

batsheva