Alec Lightwood did not spend his whole life suppressing his feelings for his parabatai and men in general and finally has the courage to express a part of who he is by stopping his own wedding (to a woman, I might add) to kiss the High Freaking Warlock of Freaking Brooklyn to be shipped with girls and have fanfiction written about him where he is involved romantically/sexually with a woman and to be labelled as bisexual/pansexual when he is a canonically gay man