No, not bare like that.
Today I did a little experiment by riding in my unpadded Lycra running shorts, to see if that might be an option for my duathlon next Sunday. It's definitely going to be long (12 km - 73 km - 8 km), and it's probably going to be hot.
It would be nice if I could get away with just wearing my running shorts for the whole thing and not having to run in bike shorts with a big wad of padding up my butt. Well, actually my favorite cycling shorts aren't too bad to run in, but if I could leave off the padding I'd be just as happy.
I learned today that I can leave off the padding for bike rides up to 26 miles. It worked okay, meaning only the average amount of chafing and no horrendous weeping sores nor blisters nor gaping bleeding holes where they don't belong nor horrific amounts of bruising.
But on longer rides I don't know. One or more of those things might happen.
My duathlon involves a 45-mile ride.