One can say that about 90% of the female anatomy displays in the show. Very little story need for any of it.
Sure they could have done the scenes without the nudity, but generally the nudity makes sense in the context in which it's presented, it's associated with a scene where there is sex, or a brothel, drunken debauchery etc.
I don't think this cock is about quotas or trying to be "equal," or what you guys are all hinting at: SJWs ruining my entertainment content yet again--but I think it was simply: "Lol--here's a cock in your face, *ssholes!"
I think you're wrong about the trying to be "equal" part, the show has come under pressure for sexual violence against women, only showing female nudity (websites actually keep track of number of instances of male vs female etc). I don't care if they want to include male nudity as well as female nudity -- it's whatever the show producers think will get more people to watch that matters. That's fine with me, I was commenting more on how weird and out of place it was.
They showed the boobs of the other actress in the play a few seconds before, and it's almost like they decided afterwards "in the interest of equal time, lets throw in a dick as well!". There was no use for it and no reason for it at that point, they could have done the scene without any nudity (male or female) and it would have been fine. The way they did it felt very out of place and forced.
Also, what was the deal with Varys and the new red priestess? She seemed to know something about the voice that talked to him when he was a child etc, and he seemed very freaked out. Did I miss something earlier, or are they opening up a new story we haven't seen yet?