to me girls+girls and boys+boys is the same, homosexuality. The way I see it is, many people have a certain type of sin that constantly drags them to commit the same sin or worse (example: bad temper, alcohol abuse, homosexuality, etc.). If your a homosexual, it will be hard to get out of that sin (the bible even states that this type of sin is hard to repent from), so the best you can do is stay abstinent or sacrifice what you love most (the same sex) and do the right thing. When God sees that, he will bless you with greater things.