In Homestar Runner there is never-ending confusion about certain characters - are they wearing clothes or do they have strange coloured skin?

The characters that fall into this mystery are Strong Sad, Coach Z, Bubs, The Poopsmith and Homestar (pants only)
Evidence for these characters being clothed:
Coach Z: Shapeshifter shows Coach Z tucking a $100 bill into his "sweat-sweats"
Bubs: in The Process Bubs mentions tearing off his shirt, in Homestar Ruiner he claims his green stripe is "a weight-loss jiggle belt!" and in Baddest of the Bands and Dangeresque 3, Bubs mentions getting naked (ew).
Strong Sad: In 8-Bit Is Enough, Strong Bad mentions Strong Sad running around "all-naturele". In Halloween Fairstival, Strong Sad's upper body is the same colour as his face. Also, his brothers are human enough for the "need" to wear clothes, if you know what I mean, so Strong Sad presumably is too.
Homestar Runner: In Homestar Ruiner it is confirmed that Homestar wears pants.
Evidence against: When they go swimming, they don't seem to take anything off. Strong Sad's bellybutton is visible all the time. Homestar's pants (or lack therof) don't "poof away" at the Senior Prom.
What do you guys think?

I'd say that Bubs is wearing clothes, Coach Z isn't and Strong Sad is. I think I'm overthinking this a bit.