The problem is the obscenity exception is also used for things like preventing someone from walking around a public park with a giant sign covered in gore porn. Something like that I think is obviously pretty okay to ban, but clearly it gets misused for a lot of homophobic/transphobic type stuff.
He has. He and his twin brother were actually part of a study into the effects of long term space habitation (his trips were shorter). They’re the only two siblings to ever both go to space.