There are etiquette things that actors, new actors, need to know about. Because it only takes one mess-up on a set to get fired. Not being where you're supposed to be or saying something to the wrong person that you're not supposed to say, and those are like basic things that the actors need to know.
The fact that a person loves one particular person is what is important; the life lesson, whether you are homosexual or heterosexual, is that you not be promiscuous, and true to one person.