Depends how hard you sweat. I don't sweat much below the waist, mostly on top of my head and armpits. So more shorts padding shouldnt be a problem. Other people sweat a lot, everywhere.
After years of seeing nothing but splinters for seats for sale, I'm beginning to see real sit on seats (8-10" wide) in the accessory dept of the local grocery/discount center. NOT at the bike shop. They are still obsessed with riding around with your back level and your neck bent back 90 deg.
The most comfortable seat I ever rode was about 8" wide, on my Mother's 1945 Firestone bike. The posture was back vertical, handlebars bent back over the thighs. That was before foam was invented even, the padding was felt or something. Heavy, slow acceleration bike, suitable only for flat Houston terrain, but was a comfortable ride, on my rather thick gluteal muscles.
The "cruiser" posture is coming back. I certainly am trying to achieve that, even leaning forwards 50 deg on my MTB makes my hands go to sleep after 30 minutes. Even using pool floats tubes as handgrips. I like the 18 or 21 gears of a MTB, though, on the hills here in Clark/Floyd county IN. Ordered a longer stem last week to try to get my hands up higher on the MTB. That will fit some turned back handlebars (1" middle) I salvaged years ago from an old 3 spd schwinn. Cuts my speed to 9 mph average and 6 in a 25 mph headwind, but at least I'm not going to pop my neck disk like my Mother did with stupidly flexed posture (at work).
To keep my gluteals from melting any more (I'm age 66) I'm doing 30 toe touches 4 or 5 times a week. I imagine the US Army daily dozen "lunger" exercise would be good for that, but my knees are too damaged to do that one anymore.
Best of luck in the hobby. Read Dr Fuhrman about changing diet to drop excess weight without hunger - I dropped 45 lb in 7 years on a 2500 carb/day diet. Sub mono-unsat vegetable fat for meat fat, no deep fried anything, limit sugar to 5 g/ meal, no snacking, vegetables 3 x a day, is the short form of what I did.
