The "that makes you gay" jokes are a little weak, guys.
Roman generals used to do this to the leaders of conquered armies.
Sodomy's a pretty ancient tradition.
It doesn't make them gay, and nothing about it is an indication of homoeroticism. As is often the case, sexual violence here is an assault upon the masculine identity and the integrity of the individual's sense of autonomy. This is not all that far-removed from the "homoerotic" sadism of US servicemen in Abu Ghraib.
Pretty much equally barbaric, but not particularly "gay".