There is a HUGE amount of homoerotic game playing going on throughout the entire scene. I can understand not seeing it because in Japan it is a little under the surface. For anyone who has spent time in the culture there is some really blatant sexual stuff going on. It is usually much more subdued. I think this is at a festival and there has been drinking going on for a few hours. Many straight Japanese men have occasional sexual contact with oter dtraight men and without a lot of guilt afterward but it is almost always in a totally private setting. These guyd on the other hand are being pretty randy. A few of them are really pushing the limit which is why its so hot
Since I like naked people, of course I liked this. All of the men had pubic hair, and one in particular had a beautiful prodigious amount of it. There were a lot of nice penises, which of course was the attraction for me. Even though there wasn't any sex or eroticism, it was still interesting.