well it was certainly done in romania; maybe seminarians.
I'm quite sure this is the work of people like ACCEPT (a Romanian association for LGBT rights, whose president used to be a seminarian, and now he's sort of changed camp) or the Secular-Humanist Association. The latter is very vocal in publicly criticizing the Romanian Orthodox Church for being exempted of taxes for its many businesses with vestments, icons etc and for building a huge cathedral in Bucharest - hence the picture in the tailor's studio and the one at the construction site of the cathedral. It's pretty much a satire in the LGBT genre. The models are highly unlikely to be real priests or seminarians, in fact they look quite ridiculous and out of character in cassocks.
There was an Italian version of this a few years ago with young priests and seminarians from Rome, done by some famous gay photographer, but those were probably real and they were fully clad in clerical attire. I guess these guys just stole his idea and tried to come up with a nastier version.