Okay, here it is.
What I am about to say... is truly shocking.
Angel and Collins are portrayed differently than Joanne and Maureen because...
THEY ARE A DIFFERENT COUPLE!!
And it just so happens that Maureen and Joanne have a more sex-oriented relationship.
Angel and Collins' relationship is ABOVE that, i.e. it is DEEPER, i.e. you have nothing to complain about!
If their relationship in the movie consisted only of hot sex, THINK ABOUT IT! Wouldn't you be complaining that there was no depth to the relationship? That they were suggesting that two men couldn't have a meaningful relationship?
If you want to see gay ACTION, I'm sure there are PLENTY of movies that will accomidate you. It just so happens that this one has decided to to show a gay RELATIONSHIP. If that bothers you, move on!