The Church's focus on same-sex issues over other sexual sins is reasonable considering that we hear the most and the loudest from those in favor of sex with same gender. 

We know the Church's teaching. Sex is between a man and a woman within a marriage. Also, we know the Church's teachings on avoiding occasions of sin and fornication. So I think that should answer your questions.  These are not societal taboos, but Scriptural and Divine teachings.