I think that says it perfectly.
There must be a large, vague area between the classified sexual preferences.
Like being straight but having a strong, special bond with someone from the same gender.
Hanno and Max make no secret of the fact that they have that bond. So not like they are really attracted to each other sexually, but more like: if I have to make out with another guy, I want it to be you. And it's not unthinkable that there are some feelings during the intimate love scenes.
Wow, I'm good at this. Talking a lot without getting my point straight.
But I'm a "feel" person. And in the last scene of Auslandseinsatz they look at each in a way that makes people think they are going to kiss. There's something special between them and I really love it.