What a question! Lol okay - In your question lies the answer “It’s very clear a lesbian girl need a girl and a starlight guy need a girl”. Do the math, when both of them need the girl, economics of demand - supply arises. It reminds me of a great quote by Joker in the movie “ The Dark Knight” - “ Their morals, their code; it’s a bad joke. Dropped at the first sign of trouble. They’re only as good as the world allows them to be. When the chips are down these, uh, civilized people? They’ll eat each other “ - the point is - who ever it is. Just scarcity of resources and moral code! Nothing else. Now please stop worrying “why” and ping me. Lol